Induction

Episode 1 of Nightwing & Batgirl.
== Plot ==
Nightwing, Batgirl, and Black Canary fought Roulette and her henchmen in stopping an illegal underground wrestling tournament she is sporting. They were disguised as the audiences, and later when the first match started, Nightwing, Batgirl, and Black Canary then showed up into the ring.
"You dare ruin the show?", Roulette told them.
"If you don't knock out this act any sooner, you might be the ones getting knocked out.", Black Canary told her.
"We'll see about that.", Roulette replied.
"Come down here and fight.", Black Canary challenged.
"As you wish.", Roulette accepted.
First, Nightwing, Batgirl, and Black Canary took down the wrestlers involved, namely Bane, Blockbuster, KGBeast, Killer Croc, Hellgrammite, and Hellhound. With their reflexes, Nightwing and Batgirl were able to evade their attacks and later outsmarted them. With her Canary cry, Black Canary knocked them down unconscious. Later, Roulette and her henchmen came in and battled the heroes. After a short fight, Roulette was later knocked unconscious by Black Canary. She was tied with a Batrope by Nightwing. Later, the police arrested her and the wrestlers involved in the tournament.
The scene moves the next day. At Nightwing and Batgirl's headquarters, they got to the rooftop and looked at the beautiful sunrise.
"Sun shines brighter in Gotham these days, doesn't it?", Nightwing asked.
"Indeed.", Batgirl agreed. "A lot has changed in this city through the years. Some for the better.", she continued.
"By that statement, I guess we've done a pretty good job making Gotham a safer and better place.", Nightwing said.
"I think so too. But there's one thing that remains.", Batgirl replied. Nightwing looked at her.
"Criminality.", she continued.
"Yes that is. But there will always be crime. We can't ever truly stop it. We can only keep it at bay. And that is our job.", Nightwing said.
"And I wouldn't mind spending a lifetime fighting crime by your side.", Batgirl replied.
They went back inside their headquarters and continued their conversation.
"It's been so many years already since you've changed your identity. Why aren't you changing your vehicles' name yet?",
"If it ain't broke don't fix it.", Nightwing answered.
"Nice", Batgirl replied.
"R-Cycle, R-Mobile, R-Plane, R-Marine, R-Ship. They all still sound cool anyways.", Nightwing said.
"And Robin didn't?", Batgirl asked.
"Now that I stepped outside Batman's shadow, I had to think of a new identity. One that would set me apart from him. For that reason, Nightwing is born.", Nightwing answered. "Have you ever thought of changing your name to something cooler?", he asked her.
"If it ain't broke, don't fix it.", Batgirl answered.
"Oh, you got me there.", Nightwing said, as they laughed.
Nightwing and Batgirl were called on to the Batcave by Batman, Flash and Wonder Woman.
"Nightwing and Batgirl. I'm back.", Batman announced.
"After almost 2 years, finally.", Batgirl replied.
"This calls for some celebration, I guess.", Nightwing said.
"That can wait. For now, Wonder Woman, Flash, and I need you. A familiar gang in Gotham is on the loose. Not just an ordinary gang. A gang of metahumans.", Batman replied.
"Oh, let's get going then.", Batgirl responded.
Now, Nightwing and Batgirl headed to the Batcave immediately.
"It's good to have you back, Bats", Nightwing said.
"Good to see you both too.", Batman replied.
"Who exactly are this gang of metahumans?", Batgirl asked.
"It's a gang of villains. Giganta, Killer Frost, and Parasite. They've escaped from prison again. And they've broken Clayface out of prison as well. Now, they're out to wreak havoc in Gotham.", Batman answered.
"Them again? We've faced them before like a hundred times already.", Nightwing said.
"And that's enough threat for the Justice League?", Batgirl added.
"Do you think we'd come here if they weren't much of a threat?", Wonder Woman asked.
"What have they done to warrant the League's attention?", Batgirl asked.
"Right now, they're out to terrorize people and we can't just let them run loose with those.", Batman answered.
"Yeah. It's dangerous for us to let them loose while they go on crime spree. We must catch them as soon as possible.", Flash said.
"Oh, now that's trouble.", Batgirl replied.
"Let's get going now.", Wonder Woman told them.
They monitored the villains' location through the Batcomputer and found out that they are doing crimes in Downtown Gotham. Now they went there and saw the villains. But, they were surrounded by their henchmen. They now fought their henchmen. The fight gave the villains time to escape. Later, they lost track of the villains.
"Oh man, they got away.", Flash said.
"Not too far away", Batman said.
Using the GPS tracking device on his wrist, Batman led the heroes to the villains' hideout. They moved forward.
They now went there and searched for the villains' hideout. While on the search, Nightwing and Batgirl had some questions.
"How did they escape?", Nightwing asked.
"And where's Superman?", Batgirl also asked.
"Superman's at Metropolis. He's got his own city to take care of.", Flash answered.
"As for how they escaped, we have no idea yet. We're suspecting an outside force broke them free. We just don't know yet who.", Wonder Woman added.
"Oh, so that explains it all.", Nightwing said.
Now they got to the villains' hideout. They saw some guards outside and they took all of those out. Now, they proceeded into the hideout. Then suddenly, the hideout's security was activated and infrared lasers blocked their way. Batman tried to hack into the security system, which he successfully did. They now proceeded, then later they got surrounded by robot drones. They destroyed all of those and now went to the main room of the villains. The villains were shocked.
"Good work, you heroes. You managed to hacked into our security", Giganta said.
"Look, guys. Whatever you are planning, whether taking over the city or just normal crime sprees, you are the Justice League's liability.", Wonder Woman told them.
"Now, surrender before things get ugly.", Flash said.
"You heard them.", Batgirl seconded.
"Not a chance.", Parasite said.
"I just hate it when the bad guys want to do things the hard way.", Nightwing said.
"Attack!", Killer Frost commanded her gang.
Now, the heroes and the villains fought.
Killer Frost attacked Batman and launched balls of ice at her. Batman groaned in pain. Now, Inque went on top of him and held his arms down the ground. Inque's touch started to send chills throughout Batman's body. His brain started freezing as well.
"Looking haggard today, aren't we, Batman?", Inque said.
"You know, you can't be handsome all the time, at some time you reach a period of decline", Batman said. "Like you. Your hair looks shiny the last time we met, but now it looks frizzy in your return.", he calmly replied.
"You know, Batman, your style of flirting is unusual today. Anyway, you've wanted to fight, not to talk. So we're now giving you what you want", Frost said.
Batman tried throwing explosive Batarangs at her but she protects herself with ice.
Now, Nightwing and Batgirl took on Clayface, Wonder Woman on Giganta, and Flash on Parasite.
Parasite pinned Flash to the ground and started absorbing his powers. Flash yelled in pain. Wonder Woman hits Parasite from behind to stop his absorption.
"Thanks. Damn. Good thing Superman wasn't here.", Flash said.
Now, Wonder Woman battled Parasite, but Parasite knocks her down, went on top of her, and started absorbing her powers. She screamed in pain.
"Good for us Superman's not around. Our job would be easier than I thought.", Parasite said.
Flash took down Clayface quickly. Nightwing and Batgirl threw explosive Batarangs at him and he was knocked unconscious and remained on the ground.
After that, the two dodged Giganta's attacks and saved Wonder Woman. They attacked Parasite from behind. Then, Nightwing hit Parasite in the head so hard, he fell unconscious.
"That's got to hurt.", Batgirl said. Then, she was knocked down by Giganta from behind.
"Batgirl!", Nightwing said.
"I'm fine.", Batgirl replied, as she rose up.
Now, Nightwing and Batgirl dodged Giganta's attacks. They later threw explosive Batarangs on him, releasing smoke around her and she was knocked down. Nightwing, Batgirl, and Giganta now battled Giganta altogether, and Wonder Woman was able to knock her unconscious, as she reverted back to her regular size.
Batman couldn't hit Killer Frost with Batarangs because she keeps covering herself in ice. She knocks Batman down, leaned on him and said, "If you had not interfered with our crimes this would've been easier".
Then Batman caught her using the Batrope, pulled her down and said, "I guess we weren't that easy".
Batman now picked up his used his specifically designed brass knuckles to knock down Killer Frost unconscious.
"Lights out, Frost.", Batman said. Now, Nightwing and Batgirl tied all the villains with a Batrope. The S.T.A.R. Labs men came and froze the villains, where they'll be brought to the Cryogenics Lab.
"Frost didn't do a good job", Wonder Woman said.
"He sure didn't.", Batman said.
"He sure also likes you.", Wonder Woman told him.
"And I sure don't like her. I got no time for that.", Batman replied.
"Oh, I see. You're too busy to be making time for love.", Wonder Woman said.
"I'm glad you know that.", Batman replied.
"But have you ever considered committing to someone? Someone special? Will that time ever come?", Wonder Woman asked.
"I haven't yet. But I hope so, Diana. Someday.", Batman answered.
"Now that we're done with the baddies, can we now go on with the celebration, Bats?", Nightwing asked.
"Yes, we can. But we're not doing it at the cave.", Batman said.
"Then where?", Batgirl asked.
He asked Martian Manhunter to teleport him, Nightwing, Batgirl, Flash, and Wonder Woman to the Watchtower. Later, they were transported there.
"Nightwing and Batgirl. Welcome to the Justice League.", Batman told them.
"Really? Please tell me this is just a dream.", Batgirl said, as she felt excited.
"All we ever wanted was to be part of the League. Now, its become a reality.", Nightwing said.
"You're officially one of us now.", Wonder Woman said.
"So, what can you say about our place?", Flash asked.
"We thank you", Nightwing and Batgirl said.
"It's beautiful.", Batgirl answered.
"Let us take you to a tour around the tower, shall we?", Flash asked.
"Our pleasure.", Nightwing replied.
== Characters ==
=== Heroes: ===
* Dick Grayson/Nightwing-a skilled acrobat and combatant, possesses a wide array of gadgets/weapons, and former sidekick of Batman. The show's male protagonist.
* Barbara Gordon/Batgirl-daughter of Gotham City Police Commissioner Jim Gordon; also a skilled combatant and has a wide array of gadgets/weapons. The show's female protagonist.
* Bruce Wayne/Batman-he's Batman.
* Barry Allen/Flash-a speedster and founding member of the League.
* Wonder Woman-a warrior princess of Themyscira, and a founding member of the Justice League.
* Black Canary-a member of the Justice League; a skilled martial artist and has powers called the "Canary Cry", a supersonic scream which she can control, and can deafen and take down enemies.
* Police
* S.T.A.R. Labs Men-people who work at S.T.A.R. Labs, a scientific and research facility dedicated to metahuman studies. Also in charge of taking custody of criminal metahumans.
* J'onn J'onzz/Martian Manhunter-a Martian(species from planet Mars) who disguises as a cop named "John Jones."; has shapeshifting abilities, density shifting(can phase through solid objects), and psychic powers(able to read and attack people's minds and communicate with them mentally). One of the founding members of the League.
=== Villains: ===
* Roulette
* Roulette's henchmen 
==== Villains found in Roulette's underground arena: ====
* Bane-a venom-powered bruiser and frequent enemy of Nightwing and Batgirl.
* Blockbuster-another large muscular Bat family villain powered by the Blockbuster formula.
* KGBeast-a Russian spy gone rogue and Bat family villain.
* Waylon Jones/Killer Croc-a man mutated into a crocodile and another frequent Bat family villain.
* Hellgrammite-a mutated insectoid human with superstrength and ability; one of Superman's lesser rogues.
* Hellhound-a martial artist and street level criminal.
=== Main villains: ===
* Giganta-an enemy of Wonder Woman; has the ability to grow into gigantic size and gaining superhuman strength in the process.
* Parasite-a frequent enemy of Wonder Woman; has the ability to absorb the energy and powers of living beings.
* Caitlin Snow/Killer Frost-a criminal with ice powers.
* Basil Karlo/Clayface-a shapeshifting villain of the Bat family.
* robot drones