Derek and Isaac

Derek gave Isaac the Bite to gain power and create a pack while also helping give Isaac the power to defend himself against his dad
Isaac lived with Derek after his father died
Derek trained Isaac to learn control and they fought for and protected each other
Derek pushed Isaac away in an attempt to protect him from the Alpha Pack
Isaac left Derek's pack and joined Scott's pack
The two remained friends and allies until they each left Beacon Hills
Derek eventually died to kill the Nogitsune, with Isaac apparently still living in France

### Ship Name

Derisaac, Halehey

**The relationship between Beta Werewolves Derek Hale and Isaac Lahey**.

Derek and Isaac first met at the beginning of Season 2, when Derek, who was tracking an Omega Werewolf through the Beacon Hills Cemetery, came upon Isaac, who was working the night shift at the cemetery and who had been pushed into an empty grave he was digging. Derek pulled Isaac out of the grave and, seeing his black eye and realizing he was from an abusive household and in need of the power to defend himself, offered him the Bite, making him the second Beta he turned since becoming an Alpha in the previous episode, after Jackson Whittemore. *("Omega")*

Derek (who, unbeknownst to anyone, was in a hurry to build a pack to gain power and defend himself against the Alpha Pack, who were about to head to Beacon Hills) was forced to team up with fellow Werewolf Scott McCall and his human best friend Stiles Stilinski to break Isaac out of jail during his first Full Moon as a Werewolf after Isaac was mistakenly arrested for the death of his abusive father and was nearly killed by one of the Argent Hunters, who also incorrectly assumed Isaac had taken an innocent human life. *("Shape Shifted")*

Isaac, who was then seen as a fugitive for several weeks, hid with Derek in the abandoned Railway Depot with his new packmates Vernon Boyd and Erica Reyes. Derek trained them all in how to survive Hunter attacks, though the pressure he was under took its toll on him, causing him to inadvertently take out his fear and anxiety on his new Betas by teaching them control through pain and violence. *("Ice Pick")*, *("Abomination")* Isaac ultimately became Derek's first Beta to be able to find an anchor and control himself during the next full moon, although Derek was initially confused when he learned it was the memories of Isaac's father from before he started abusing him that kept him human. *("Party Guessed")*

The threats from the Hunters and the newly arrived Kanima ultimately caused Boyd and Erica to flee from Beacon Hills in hopes of finding a pack in a much safer location, leaving Isaac as the only Beta left in the Hale Pack, though they eventually got Boyd back and added two more members, Peter and Cora Hale. Unfortunately, Erica did not survive to rejoin the pack as she was killed by the Alpha Pack member Kali during the four-month period that she, Boyd and Cora spent as prisoners of the Alphas in the abandoned First National Bank vault. *("Battlefield")*, *("Master Plan")*, *("Chaos Rising")*

When the Alpha Pack finally arrived, Derek's ability to cope with his fear and stress regarding how they could hurt his packmates caused him to lash out at his Betas even more severely, which eventually led Derek to kick Isaac out of his loft, believing that having Isaac there would make him more of a target of the Alpha Pack. In an especially low moment, Derek became so upset when Isaac questioned him on his decision to kick him out that he lost his temper and threw a glass at Isaac's head, a move so similar to how he was abused by his father that it triggered the younger Werewolf's survival instinct and ultimately ensured that Isaac would leave. Though Isaac immediately moved into the McCall House with Scott and his mother, Melissa, the tension between Isaac and Derek as a result of this fight continued to linger for some time. *("Unleashed")*

However, in spite of the unresolved tension between them, Isaac joined Boyd in launching a strike against the Alphas, only for the move to once again backfire when Kali, Ethan, and Aiden killed Boyd by forcing Derek's claws into his chest while he was weakened from being electrocuted. *("Currents")* This traumatized both men, but especially Derek, due to his role in turning Boyd and introducing him to the supernatural world, causing him to freeze up just as the Beacon Hills packs were forced to fight a war on both sides, with both the Alpha Pack and the Darach threatening them and their town. *("The Girl Who Knew Too Much")*, *("The Overlooked")* His guilt-induced indecision while numerous lives were at stake caused Isaac to leave the Hale Pack and join what would become the McCall Pack, led by the newly ascended True Alpha Scott McCall. *("Alpha Pact")*

However, when Derek sacrificed his own Alpha powers to save his sister Cora, Derek and Isaac repaired their relationship, as Derek no longer being an Alpha meant that he was free from the enormous pressure of maintaining and protecting a pack. *("Lunar Ellipse")* Taking a role as a teacher and leaving the leadership to Scott, Derek was able to become an ally and mentor to the McCall Pack, he and Isaac remained friends up until the death of Isaac's girlfriend Allison Argent caused Isaac travel to France with Chris Argent, where he ultimately chose to stay permanently. *("The Divine Move")* Shortly afterward, Derek, too, left Beacon Hills for South America, leaving the status of their friendship unknown *("Smoke and Mirrors")*.

As far as it is known, Isaac has remained in France while Derek was blessed with a son named Eli. In 2026, in order to ensure the Nogitsune was destroyed once and for all, Derek held the Dark Kitsune immobile and allowed Jordan Parrish to incinerate them both to death, causing Eli to join Scott and the rest of the McCall Pack.

## Throughout *Teen Wolf*

* Season 2
* Season 3A
* Season 3B

In *Omega*, Isaac was working in his family's cemetery, using a backhoe to dig a grave for Kate Argent's funeral the following morning. He stopped for a moment to look in the rear-view mirror, where he winced and touched a bruise blooming around his right eye. He was suddenly startled by a noise moving in the nearby woods, but before he could react further, something overturned his backhoe, causing him to fall into the grave he just dug. Alarmed, Isaac frantically looked up to see a dark, fast-moving figure leaping overhead, though he was unable to escape because the backhoe was blocked the opening. He only became more scared when the sounds of growling and fighting were heard nearby.

After a long moment, a whine was heard just before the backhoe was pulled off of the grave, revealing Derek standing on the edge of the hole dug into the ground. He then smirked and asked Isaac if he needed a hand. The next night, Isaac was seen walking into the abandoned Railway Depot to meet Derek, where he was presumably given the Bite and turned into a Werewolf, the second Beta bitten and turned by Derek after Jackson Whittemore.

In *Shape Shifted*, Isaac and his father, Mr. Lahey, got into a heated argument about Isaac's grades, escalating to the point that the latter threw a glass at Isaac's head, causing the glass to hit the wall, shatter, and shower the young man's face in shards of glass. A small chunk of broken glass embedded itself into the skin below Isaac's eye, but when he pulled it out, his skin healed right before Mr. Lahey's eyes, forcing Isaac to run out of the house to avoid telling his dad that he had been turned into a Werewolf several nights earlier by Derek Hale.

When Mr. Lahey chased Isaac, who sped away on his bike, into town in his car, he was cornered by the newest shapeshifter in Beacon Hills, a Kanima who immediately ripped off the door to his car and mauled him to death. Isaac, not knowing what else to do, ran to the Railway Depot to frantically tell his new Alpha, Derek, about what had just happened.

The next day, Isaac went to school as usual, attending early morning lacrosse practice. While getting changed, Scott McCall, whose superhuman senses were especially sensitive due to that night's impending full moon, caught a scent that suggested another Werewolf was in the room. After some sleuthing during practice, Scott finally figured out that the other Werewolf was Isaac, who begged Scott not to tell anyone just before the Sheriff's deputies arrived and arrested him for the murder of his father, as Jackson Whittemore had informed Sheriff Stilinski that he was regularly being beaten by Mr. Lahey, giving him motive for his murder.

Just as Scott and Stiles had run out of the school to stop them, knowing that Isaac being thrown in jail during his first full moon could cause him to kill anyone in his sight, they found Isaac in the back of a deputy cruiser, where he was being driven to the Beacon County Sheriff's Station. A moment later, Derek pulled up in his Camaro and demanded that Scott get in. When Scott protested by stating that it was Derek's fault that this happened, Derek reluctantly agreed that he was right before gruffly asking him to help him fix the situation.

This first involved Derek taking Scott to the Lahey House, where they found evidence of Mr. Lahey's abuse toward Isaac—a large deep-freezer in the basement that had numerous fingernail gashes inside and which was covered by chains; Derek and Scott focused their senses to determine that it was the site of where Mr. Lahey locked Isaac up to punish him based on the chemosignals that indicated fear in the area.

Meanwhile, at the Argent House, Allison Argent overheard her father, Chris Argent, and grandfather, Gerard Argent, sending out a Hunter to the Sheriff's station and called Stiles Stilinski to warn him of what she learned; upon collaborating with Stiles, the two figured out that the Hunter was planning to kill Isaac with Wolfsbane and passed on the information to Derek and Scott.

Derek, intent to help his new Beta, left Scott at the Lahey House to lock himself up for the impending full moon and teamed up with Stiles, the son of the town's Sheriff, Noah Stilinski, to break Isaac out of his jail cell. They arrived to find that Stilinski's keys to the holding cells were missing from their lock box and found that the Hunter sent by the Argents had gotten there first and stolen them, having had the same break-in plan as Derek and Stiles.

Just as Stiles was about to be attacked by the Hunter, Isaac, in his full Werewolf form and crazed by the full moon, broke out of his cell and attacked the Hunter before setting his sights on Stiles. However, before he could harm Stiles, Derek arrived and roared at Isaac, forcing him to submit to him with his Alpha powers. Since Derek and Stiles managed to break Isaac out of jail, the newest Beta was now a fugitive from justice and was forced to move in with Derek at the Railway Depot due to the Beacon County Sheriff's Department hunting him along with the Argent Hunters.

In *Ice Pick*, Scott McCall, Stiles Stilinski, and Allison Argent figured out that Derek and Isaac's duo had expanded into a trio with the inclusion of Erica Reyes, their newly-bitten classmate, and soon realized that Derek was building a pack of his own. Upon learning that classmate Vernon Boyd was Derek's next choice, Scott rushed to the Beacon Hills Ice Rink where Boyd worked in hopes of being able to talk him out of accepting the bite.

Unfortunately, Boyd was not interested in hearing what Scott had to say, and when Scott asked him if Derek had told him *everything* he would be getting himself into if he became a Werewolf (such as the Hunters and the newest shapeshifter to appear in Beacon Hills, who had already killed Mr. Lahey and a mechanic), Boyd insisted that Derek filled him in, and that he had still come to the same conclusion—he was going to join the Hale Pack. He went on to say that he wanted to not sit by himself every day at lunch, and Scott sympathetically replied that if it was friends he wanted, he could do a lot better than Derek, leading the older Werewolf to appear behind him with Isaac and Erica at his sides.

Feigning offense, Derek claimed to be hurt before stating that if he was going to be giving him a review, he should at least get everyone's opinion prior to coming to a conclusion. He then looked at Erica and asked her how her life had been since she was turned, with the female Beta smirking and replying that it was *transformative* before flashing her fangs and roaring at Scott. He then turned to Isaac to ask the same question, which Isaac answered with the same smug attitude-- "Well, I'm a little bummed about being a fugitive... but, other than that, I'm great."

Erica and Isaac then got into a fighting stance, causing Scott to roll his eyes and state that this wasn't going to be a fair fight. Derek, thinking that Scott was intimidated by his new Betas, smirked and told Scott he could go home, then, but Scott simply growled, "I meant, fair to *them*" before slamming his fist down on the ice, cracking it with the force behind the strike as he shifted into his Werewolf form. He then engaged in a one-versus-two fight with Erica and Isaac while Boyd and Derek watched, but with Scott having three full moons under his belt and months of experience controlling his transformation as opposed to the new wolves, who had only been turned several days ago, Scott quickly defeated them.

Boyd looked impressed by Scott's skills, and Scott ranted, "Don't you get it? He's not doing this for you. He's just adding to his own power, okay? It's all about him. He makes you feel like he's giving you some kind of gift, when all he's done is turn you into a bunch of guard dogs!" This seemed to affect Derek, who was already disappointed by Erica and Isaac's performance against Scott, but he shrugged it off by agreeing that it *was* about power before slowly shifting and beginning to fight Scott himself.

This time, Scott, who had already used most of his energy on the previous fight, was unable to overcome his opponent, and Derek's superior Alpha-level strength injured Scott severely enough to end the battle. As Derek walked away, Scott looked up at Boyd and insisted that Boyd didn't want to be like Derek, but Boyd just lifted his shirt to reveal that Derek had already bitten his side before retorting, "You're right... I wanna be like *you*."

In *Abomination*, Derek and his Betas gathered at their new home in Railway Depot to start training. Isaac (who already had access to all of his Werewolf powers due to having endured his first full moon, unlike Boyd and Erica) performed multiple parkour feats with his supernaturally-enhanced agility while heading toward Derek to attack him, but the Alpha grabbed him and tossed him to the ground over and over again, which earned amusement from Boyd, who was merely watching the session. Erica attempted to catch Derek by surprise by jumping from one of the platforms above but she ended up being tossed to the ground and landed next to the equally-exhausted Isaac.

Derek rolled his eyes as he started to back away and retorted "Does anyone wanna try not being completely predictable?!", leading Erica to try to rise to the challenge by lunging for Derek and proceeding to kiss him. Derek kissed her back for many seconds until he shook her off him and harshly instructed her to never do such thing again. Erica assumed that it was because she was a Beta, but Derek corrected her by revealing that he had "someone else" in mind for her. Though he did not mention any further details, it was clear that he wanted her to seduce Scott McCall and break up his secret relationship with Allison, as Derek saw Scott's relationship as both a threat to all of them (due to her family being Hunters) as well as a barrier to getting Scott to join their pack.

Isaac asked Derek if they were done training, complaining about having a hundred bones that needed time to heal. Derek initially seemed to sympathize with his first turned Beta and offered his hand but, suddenly, he snapped Isaac's arm as he looked at him in the eyes and averred "One hundred and one. You think I'm teaching you how to fight, huh?? Look at me!! I am teaching you how to survive!", scaring Boyd and Erica.

Derek finally let Isaac go and the latter angrily questioned why the Argents were not coming for them at the moment if they wanted the four of them dead. Derek calmly stated that he did not know and brought up the mysterious and unidentified shapeshifter that killed Isaac's father and, apparently, murdered someone else the previous night. Given this threat, the threat of the Hunters and the next full moon, Derek warned Boyd, Erica and Isaac that they would have to learn everything Derek knew as fast as he could teach them.

In *Venomous*, Derek, upon learning that they were dealing with a Kanima, a mutated version of the Werewolf species, sent Erica to the high school to search for and kidnap Jackson Whittemore, who Derek had bitten in Season 1's Code Breaker hours after becoming an Alpha and was one of Derek's suspects to be the Kanima, especially when he had shown signs of rejecting the Bite in Omega.

After Erica returned to the lair with the subdued Jackson, Isaac helped her to hold Jackson down as he was interrogated by Derek. Isaac laughed when Jackson admitted that he had video-tapped himself during his first full moon, irritating Jackson, who simply told that he was preparing for the "gift" Derek promised him but seemingly ended up getting nothing. Derek denied allowing Jackson to get the video to prove that he was telling them the truth and Erica and Isaac forced Jackson to open his mouth, allowing Derek to put a drop of Kanima Venom into his mouth, but he ended up paralyzed like the other Kanima victims. This led Derek to move to his next suspect-- Lydia Martin.

The next day, Isaac intimidated Jackson into talking to Sheriff Stilinski and retract his testimony of witnessing Isaac fight with his father on the night of his death, thereby removing Isaac from the list of suspects and allowing him to return to his life as a high school student. During chemistry class, Isaac managed to coat his and Lydia's experiment, a sugar crystal, with Kanima Venom, before encouraging Lydia to eat it. Ultimately, Lydia was completely unaffected by the venom, leading Derek, Isaac, and the rest of the pack to come to the conclusion that Lydia was the Kanima and begin planning to kill her before she could hurt anyone else.

When Scott McCall's attempt to dissuade Derek from killing Lydia failed, he instructed Allison Argent and Stiles Stilinski to take Lydia (and. by extension, Jackson, who "needed to talk to Lydia about something important") to his home, and that he would catch up with them later. Derek sent Erica and Isaac to break into the house while Boyd waited outside with him. However, Derek eventually had to admit defeat after Scott and his friends managed to incapacitate Erica and Isaac just before dragging them outside to drop at his feet. Seeing how Scott, Allison, and Stiles worked as a team, Derek acknowledged that he was wrong about Scott being an Omega—he was actually an Alpha of his own pack of humans.

Their argument was interrupted when they heard sirens from approaching police cars headed their way, as Lydia had called the police after Jackson's mysterious disappearance. Before the police arrived, they all witnessed the Kanima crawling through the roof and hissing at them threateningly before disappearing, only to then be stunned by the fact that Lydia soon ran outside and demanded to know where Jackson was, proving once and for all that Jackson was, in fact, the Kanima. However, Derek, Isaac, Boyd, and Erica were unable to stick around long enough to make this connection due to the incoming police presence, and instead only picked up on the fact that Lydia wasn't the Kanima after all.

In *Restraint*, Derek had gathered Isaac and Erica at the Railway Depot, where he asked for their help in convincing Scott and his friends to help them take care of their Kanima problem. Isaac didn't understand why they needed their help, so Derek explained that not only was the Kanima harder to kill than he initially thought, but they also still didn't know the creature's human identity.

Even still, Isaac was skeptical that the Omega and his friends had managed to figure out who the Kanima was, but Derek insisted that it was possible that they knew, which was why he needed one of them to get on their good side. Erica was pleased by these instructions and asked him if he wanted her to seduce Stiles or Scott, but Derek, exasperated by this conversation, sighed and stated that either would be fine.

Isaac, still not convinced, reminded Derek that the full moon was coming, leading Derek to irritably snap back that he was aware before pulling out a chest full of horrifying-looking restraints that Erica sarcastically retorted "looked comfortable." Isaac brought up the fact that Derek promised to teach them how to shift into their Werewolf forms whenever they wanted, and though Derek assured them that he would, he argued that they hadn't had time lately.

Worried, Isaac pointed out that if they didn't learn before the full moon, Derek would have to chain them up and would thus be unprotected and alone in the chance that the Argents came for them. Derek maintained that they would be fine because the Hunters had yet to find them, but Isaac still believed it was best if they forgot about the Kanima in favor of being able to protect themselves against the threats that are actually directly affecting them. Derek finally lost his temper and yelled that they couldn't, and when Erica and Isaac looked at him with concern, his voice softened and he added, "There was something about the way Gerard looked at it... He wasn't afraid... at *all*. I don't know what he knows, or what he's planning... But, I'm sure about one thing-- we have to find it first."

Despite Derek's instructions to the two Betas, only Erica complied with his orders, as Isaac was nowhere to be seen until the end of the episode, when Erica was brought back to the Railway Depot by Scott and Stiles after she had a seizure following exposure to the Kanima's venom. Isaac was among the teens watching as Derek broke Erica's arm in order to trigger her accelerated healing ability so that she could recover from both the seizure and the venom. Afterward, Derek admitted that he had known the Kanima was Jackson since the fight at the McCall House, and he only sent Erica and Isaac to confirm it. Seeing the danger they were all in, Scott agreed to join the Hale Pack, but only under one condition—that they *catch* Jackson, not kill him.

In *Raving*,

In *Party Guessed*,

In *Battlefield*,

In *Master Plan*,

In *Tattoo*, after being summoned by his mother Melissa McCall to pick up Isaac, who had been rescued by a mercenary named Braeden from Alpha twins Ethan and Aiden and was severely injured in the process, at the hospital, Scott found an Alpha Werewolf named Ennis wheeling the unconscious Isaac into an elevator. After sensing that he was no good news for Isaac, Scott ran towards Ennis and managed to get into the elevator right before the doors closet before engaging in a fight with Ennis, who easily gained the upperhand and lifted Scott in a choke-hold. While Ennis was reminding Scott of his Alpha status, the elevator reached the next floor and Derek stabbed his claws into Ennis' back, replying, "So am I." before throwing him out of the elevator.

Derek and Scott were joined by Stiles in bringing the unconscious Isaac to the ruins of the Hale House. Although Isaac's wounds healed, they did not heal inside, forcing Derek to fetch some plants that looked like Wolfsbane to heal Isaac's internal wounds. Scott interrogated Derek over the Alpha in the hospital that tried to capture Isaac, but Derek simply replied that there was a new pack in Beacon Hills and that it was his issue. Derek thanked Scott for his help but insisted that he had to deal witth his new pack himself, asking his former protégé to go back to his normal teenage life.

While Isaac remained unconscious from the anesthetics that the toe-calwed Alpha Kali gave him earlier, Derek helped Scott in making his tattoo of two bands visible by burning his arm with a torch, bypassing Scott's accelerated healing ability and making sure that the tattoo was burned into his arm muscles. Just as Scott and Stiles were preparing to leave, Scott noticed that Derek had painted his door and realized Derek was still hiding something from him, to which Derek denied. Against Derek's demands, Scott clawed the paint off the door, revealing a black triskele symbol. Having been caught, Derek informed Scott and Stiles that a pack of Alphas arrived to their town as well as that they had captured Erica and Boyd nearly four months ago, during which time both Derek and Isaac, joined by Peter, had been looking for the two missing Betas. He also revealed that the Alpha Pack had a leader named Deucalion.

Just as Derek, Scott and Stiles were debating over how they would face the new threat of the Alphas, Isaac finally woke up and asked for Braeden's whereabouts, though neither of the three had no idea of what or who he was talking about. Unbeknownst to them, Braeden faced off with the Alpha Pack in the high school and was apparently killed by Deucalion, who slashed her throat to ensure that she could not reveal his plans for Derek and Scott.

In *Chaos Rising*, an anxious-looking Isaac was seen pacing around the main room in Derek's loft, with Derek standing sit in a chair reading a book. Isaac expressed his insecurity in their latest plan, considering it to be too dangerous. When Isaac seriously wanted to know if it really had to be "him," Derek reminded him that "he" was the only one to do "it" without harming Isaac because Derek had never performed such thing before.

Isaac stammered that Scott did not neither like nor trust "him" and he would most preferably trust in Scott's approach. Derek questioned Isaac if he did trust him and Isaac hesitated for a brief moment before responding in the affirmative before insisting that he did not like "him," to which Derek responded, "Nobody likes him." "Him" being Peter Hale, who arrived to the loft and immediately greeted the two younger men. He confessed that although most of his abilities had been impaired since his return from the dead, his sense of hearing was still working, and encouraged them to straightly say whatever they thought and felt right in his face.

A bored Derek shooted "We don't like you." before getting to his feet and demanding Peter to stop talking and just help them. Peter complied with his nephew's demands and whipped out his claws, instructing Isaac to remain calm because it would be that way that he would get the most out him. He once again brought up the plan—Peter would perform the ancient memory manipulation ritual typically performed by Alphas and dive into his memories to see what Isaac saw while breaking into the Alpha Pack's hideout. However, Isaac remained uneasy and before Peter could answer to Isaac's question of if he had done the ritual correctly before, Peter sticked his claws into the back of Isaac's neck and gained access to some of his memories days earlier.

Peter managed to briefly see Boyd and saw Boyd and another girl acting strangely and growling inside what appeared to be a bank vault. The leader of the Alphas, Deucalion, seemed to have caught Isaac breaking into his hideout and spying on him before Peter ended the ritual. Peter confirmed to Derek that Isaac had indeed found Boyd and Erica and revealed having overheard a conversation between Deucalion and the other Alphas that implied that the two Betas would be killed by the Alphas in the next Full Moon, which happened to be in the next evening.

Needing more information in order to work out a plan to rescue their packmates, Derek and Isaac joined Scott and Stiles in Alan Deaton's animal clinic, where Deaton suggested submerging Isaac in icy water to slow down his heart rate to the point of "nearly dead" in order to gain access to the young Beta's subconscious. When Isaac seemed visibly uncomfortable with the plan, Derek reassured Isaac that he would not be forced to do it if he considered it to be too risky, but Isaac's determination to help in rescuing his packmates from the Alphas spoke louder and he was put in the ice bathtub. After struggling against Derek, Scott and Stiles' efforts to keep him underwater, Isaac was put in a trance like planned.

Right afterward, Deaton instructed Scott, Stiles and Derek to remain silent because Deaton would be the only one to talk to Isaac and many voices could confuse the young Beta and cause him to get out of the trance, to which Derek, Scott and Stiles agreed. Deaton began interrogating Isaac over the day that he had found Erica and Boyd and asked him to give as many details as possible of the location where he found them. Isaac started freaking out and made clear that he did not want to remember that day, though Deaton comforted him and insisted that he could not be harmed by memories. Isaac calmed down and began answering Deaton's questions, describing the Alphas' hideout as an abandoned building with marble in its construction.

Before Isaac could give any other detail, he began to react badly, shouting "Someone's here! They're here!" Fortunately, Deaton was capable of getting Isaac back in control and asked him to tell them what he was seeing. Several days ago, Isaac was investigating the abandoned building and his superhuman sense of hearing caught Boyd's voice as he claimed that he could not control his Werewolf side. Isaac admitted to Deaton, Derek, Scott and Stiles that he could not see neither Boyd nor Erica but informed them that the two seemed very concerned about the upcoming full moon and the chance of them hurting each other. Deaton insisted that they had to find Boyd and Erica as soon as possible and asked him if he had seen anything in particular in the building (a number on the door, a sign, etc.). Suddenly, Isaac rose and became frightened, stammering, "They're here!" over and over again before freaking out once more, "They see me!" causing Derek to, against Deaton's wishes, demand more precise answers to what he was seeing. Isaac's memories seemed to be coming back and he excitedly shouted "It's a vault! It's a bank vault" before he was caught and pinned to the ground by Kali.

Isaac came out of the trance and while he was being wrapped with towels, he revealed that the Alphas were keeping their packmates locked inside the vault of the abandoned First National Bank. However, there was something missing given the faces of Deaton, Derek, Scott and Stiles, as the latter questioned Isaac if he remembered the last thing that he had said before coming out of the trance. Isaac retorted in the negative, leading Stiles to confess that the Alphas had locked Isaac in a room with a dead body in it—Erica's.

Derek was absolutely unconvinced that Erica could be dead, only for Stiles to insist that Isaac made it very clear it was Erica, arguing that his eescription did not leave them with much room for interpretation. Everyone wondered who was the girl locked up with Boyd until Scott brought up the mysterious girl, Braeden, that had rescued Isaac from the Alphas, though Isaac persisted that Braeden was not a Werewolf and the girl with Boyd was. Stiles wondered if the Alphas had pitted Boyd and Erica against each other to see which one of the two Betas survived, thereby leading to Erica's demise and Stiles came to consider this a "Werewolf Thunderdome." More concerned than ever with the well-being of his Betas, Derek was determined in breaking into the bank right away to save them but the others advised him against it because it could be the best way to get himself killed. Stiles proceeded to do all of his research on the bank and help devise a plan to rescue the Betas.

The next night, which was the full moon, Isaac was presumably recovering from his hypothermia as he was not present in Derek's loft, where Derek, Peter, Scott, and Stiles had gathered to look into the plan of breaking into the vault. After Derek proved that he could punch through the vault's thick marble walls by punching Stiles' hand, he asked for Peter and Scott for either of them to come with him, though Peter refused because he had not yet recovered from being dead for many weeks and saw the plan as too risky, especially when they were dealing with a pack of Alphas full of cold-blooded killers, not to mention that two of them, the Steiner twins, had the power to combine into an enormous Alpha. Scott ultimately went with Derek to the bank so they could rescue the Betas from the Alphas' clutches.

In the bank, Derek and Scott successfully punched their way into the vault and found Boyd and the unknown she-wolf, who was identified as Derek's beloved younger sister Cora Hale, who was believed to have died in the Hale House Fire several years ago. Marin Morrell trapped the four wolves in the vault with a circle of Mountain Ash and Boyd and Cora lost control over their wolf side because they were prevented from transforming for the last three full moons over the summer due to the vault being made out of a mineral known as Hecatolite, or moonstone. Deucalion's ultimate plan was have Derek or Scott or both kill Boyd and Cora for their initiation into the Alpha Pack.

Earlier, Allison had broken into the bank to confirm if Boyd and Erica were being held captive there, only to be found by Morrell and instructed to hide in the nearby supply closet. After concealing her scent from the Alphas, she was horrified upon discovering Erica's lifeless corpse. Once she heard the fighting between the four Werewolves, she left the closet and broke the Mountain Ash seal to save Scott from being killed by Boyd, setting the feral Boyd and Cora loose. Derek was furious beyond belief at the young Huntress because the two feral wolves would kill anyone in their path, though Allison insisted that Derek was the one "turning teenagers into killers."

In *Fireflies*,

In *Unleashed*,

In *Frayed*,

In *Motel California*,

In *Currents*,

In *The Girl Who Knew Too Much*,

In *The Overlooked*,

In *Alpha Pact*,

In *Lunar Ellipse*,

In *Anchors*,

In *More Bad Than Good*,

In *Galvanize*,

In *Illuminated*,

In *Silverfinger*,

In *Riddled*,

In *Letharia Vulpina*,

In *The Fox and the Wolf*,

In *De-Void*,

In *Insatiable*,

In *The Divine Move*,
## Trivia

* Derek was the first person Isaac lived with after the death of Mr. Lahey, first at the Railway Depot, and then at Derek's loft.
* Derek was also Isaac's first Alpha and the Werewolf who turned him and gave him his powers. Isaac's second Alpha was Scott McCall.
* It was said that Isaac accepted Derek's offer of the bite because becoming a Werewolf would give him the power to be able to defend himself against his father, Mr. Lahey, though he still feared the man even after his transformation. Although Isaac eventually began to understand Derek's ulterior motives for turning him during Season 3 (i.e. to gain the power necessary to protect himself against the looming Alpha Pack and to give him a sense of family and pack after losing his original ones in the Hale House Fire), he still seemed grateful to Derek for giving him the means to take back his power in the face of his abusive father.

## Gallery

*Omega**Ice Pick**Venomous**Raving**Party Guessed**Party Guessed**Party Guessed**Party Guessed**Master Plan**Chaos Rising**Fireflies**Fireflies**Fireflies**Fireflies**Unleashed**Currents**Currents**Alpha Pact**Alpha Pact**Alpha Pact**Alpha Pact*