The Vampire Diaries Season 2, Ep. 21 "The Sun Also Rises"

Matt and Caroline are in the Lockwood cellar while Tyler - in wolf form - attacks them. Matt panics and shoots Tyler. Meanwhile, Greta feeds Jenna her blood, completing her transformation into a vampire. It is revealed that Elijah is seeking revenge on Klaus for killing all of his family and burying their bodies at sea. Stefan receives a call from Damon revealing that Klaus plans to use Jenna as the vampire sacrifice; Stefan however wants to offer himself as the sacrifice in place of Jenna. Meanwhile, Klaus has begun the ritual and has already killed Jules. Stefan arrives and asks Klaus to switch places with Jenna; however, Klaus does not accept his offer and kills Jenna. Back at the boarding house Jeremy, John, Bonnie, Damon, and Alaric find a spell that can bring someone back to life after they have died by connecting the life of the parent and the child. John has Bonnie complete the spell on him, connecting him and Elena together. At the ritual grounds, Stefan watches in horror as Klaus drains Elena's blood. Back at the old mansion, Bonnie leaves with Damon and Elijah, she casts a spell on the house trapping the humans inside, unwilling to let anyone else get hurt. With the doppelganger dead, Klaus has completed the ritual and begins to transform. However, Bonnie arrives and uses her powers to weaken him, while Damon kills Greta. With Klaus on the brink of death, Elijah steps in. Before Elijah can rip out his heart, Klaus says he didn't bury the bodies at sea and if he is killed, Elijah will never find them. He promises to take Elijah to them, and gives him his word. Elijah rethinks the situation, but Stefan and Bonnie urge him to not trust Klaus. However, he changes his mind and leaves with Klaus. Damon takes Elena's body to the old mansion on the site of the witch massacre, and waits for her to come back to life, hoping she won't come back as a vampire as he doesn't want her to hate him forever. Back in the basement, Jeremy reads the whole spell and realizes that once the child is revived the parent will die. He asks John if he read the whole passage and John replies that he did. John gives Jeremy a letter and his ring to give to Elena. While Damon, Jeremy, and Alaric watch as Elena comes back to life, John silently walks away. Elena comes back to life and John looks at her one last time and falls to the ground dead. Jeremy and Elena are devastated at losing both their parents. Before the funeral, Elena apologizes to Jeremy saying that because of her he has lost everyone. Jeremy replies that at least he has her. At the funeral, Damon reveals to Stefan that he was bitten by Tyler and asks him to do Elena a favor and not tell her as the last thing she needs is another grave to mourn. Stefan promises to find a cure, but Damon says there is no cure and walks away.