Title: Original Vampires (The Vampire Diaries)
Content:  He is portrayed by New Zealand actor Daniel Gillies. Elijah is the third born child to Esther and Mikael. Elijah first appears in "Rose", the eighth episode of the second season of The Vampire Diaries. He is brought into the circle by two vampires named Rose and Trevor. They make a deal to be allowed immunity from Elijah and the Originals if they hand over Elena Gilbert, the new Petrova doppelgänger. It is later revealed that Rose and Trevor were the vampires who failed to keep Katerina Petrova (Katherine Pierce) alive for Klaus to sacrifice in the ritual required to 
Title: Original Vampires (The Vampire Diaries)
Content:  make their feelings for each other clear. When Esther returns, she reveals the truth about how Elaijah's first love, Tatia, was killed, proving it was in fact himself who had fed on her when they had newly been vampires. During one of Finn's spells Elaijah is trapped in a room with animal heads which represent each brother of the family. To escape, Elijah discovers you must ruin the representation of each other, thus causing him to share with Klaus that he killed Tatia. When Klaus proves he is capable of forgiveness the spell is broken and they are free.
Title: Original Vampires (The Vampire Diaries)
Content:  In season two's finale however, it is revealed that Klaus double-crossed Elijah once again, and daggered him to keep him close to him, like the rest of his daggered siblings. Damon undaggers Elijah later in season 3 to help him find a way to kill Klaus. When Elijah awakes, he undaggers the rest of his siblings who were located in similar coffins in the same room. They begin to plot their revenge against Klaus; however, before they can make their move, their mother Esther, thought to be dead, reappears and convinces the siblings to be a family again [which 
Title: Original Vampires (The Vampire Diaries)
Content:  Elena comes to be fond of Elijah's company. She thus feels especially betrayed when earlier Elijah threatened to allow Rebekah to kill Elena if the Salvatore brothers are not able to stop Esther Mikaelson from killing the Original Family. However, in the 18th episode of season 3, Elena professes that she hopes that her vampire friends are descended from Elijah's bloodline, so that he can be spared. Elijah returns to town in the season three finale episode, "The Departed", in order to make a deal with Elena and her friends. Elijah proposes that he be allowed to take Klaus's 
Title: Original Vampires (The Vampire Diaries)
Content:  a mystical dagger that can kill an Original when dipped in ash from the white oak. When Klaus comes to town, Elena un-daggers Elijah because she needs his help, and he then reveals to her his family's history, and the fact that Klaus killed the rest of his siblings. Elijah thus at first tries to help Elena and her friends kill Klaus, but ends up saving him instead in the Season 2 finale episode, because Klaus promises to take Elijah to their family (Elijah had assumed Klaus had hidden their "dead" bodies deep in the ocean) if Elijah spares 
Title: The Vampire Diaries (season 1)
Content:  father, Richard Lockwood. Caroline's mother, Sheriff Elizabeth Forbes is also a member, despite being friends with Damon, unknown that he is a vampire. Anna also starts a relationship with Jeremy. Jenna also starts dating a man named Logan, who cheated on her in the past. Soon, Logan is turned into a vampire by Anna, and is killed by Alaric, who tells her he left town. From that point Jenna starts dating Alaric. It is not long before Elena and Jeremy's uncle John, who they grew up hating shows up. John is working for the council. The Council wish to use the Gilbert device to kill all vampires 
Title: The Vampire Diaries (season 2)
Content:  Elijah says he has an elixir that can save Elena from dying. Elena believes Elijah, but Damon says that there is another way to save her life and feeds her his blood. Stefan tries to stop him, but he stabs in the chest with the wooden dagger. Elena then cries that she will be a vampire against her will. Maddox kidnaps Tyler and Caroline. Damon frees them and is bitten. Then he goes to Klaus to tell him that he does not have a werewolf and witch, as he killed Maddox. Klaus says that he has backups. Klaus takes Elena from Stefan. 
Title: Original Vampires (The Vampire Diaries)
Content:  turns out to be a front for her true motives; she wants to link her children's lives together and kill one of them to kill the rest, rendering vampires extinct]. After Elijah foils his mother's plans to kill him and his siblings, he leaves Mystic Falls a tortured soul, ashamed of his own barbaric actions and those of his family's. He is shown to be one of the most sophisticated and peaceful of the Original siblings, alongside his older brother Finn. He is the most compromising regarding Elena and her friends. Elijah and Elena develop a sort of understanding, 
Title: Original Vampires (The Vampire Diaries)
Content:  hand her over to Klaus. When Elijah discovers this, he makes peace with Elena and her friends, because he wants to use Elena as bait to draw out Klaus and kill him. He thus makes a deal with Elena that if she helps him kill Klaus, he will leave her family and her friends alone and keep them safe. However, he intends for Elena to be successfully sacrificed, as once Klaus breaks the curse and starts transforming, he will be left vulnerable enough to be killed. During a series of events, Elijah is temporarily "killed" when Elena stabs him 
Title: The Last Day (The Vampire Diaries)
Content:  Elijah (Daniel Gillies) explains the curse to Elena (Nina Dobrev), Stefan (Paul Wesley) and Damon (Ian Somerhalder) and what is needed. A witch to cast the spell, a sacrifice of a werewolf and a vampire and Klaus to drink the doppelganger's blood. Elijah has an elixir that will bring Elena back to life but he cannot reassure them that the elixir will work. Damon does not like the plan and prefers to go with the original one where Bonnie will kill Klaus, but Elena does not agree. Alaric (Matt Davis) gets to the Salvatore house but Jenna does not believe that Alaric is really Alaric and holds a cross bow at 

Question: when does elijah first appear in vampire diaries?
Answer: Rose.
"Rose".
Season two.