"500 Years of Solitude" is the eleventh episode of the fifth season of the American series The Vampire Diaries and the series' 100th episode overall. "500 Years of Solitude" was originally aired on January 23, 2014, on The CW. The episode was written by Julie Plec and Caroline Dries and directed by Chris Grismer. To celebrate the 100th episode, characters/actors who either left the show or died in the series returned for a special appearance. Those actors are David Anders as John Gilbert, Sara Canning as Jenna Sommers, Matt Davis as Alaric Saltzman, Kayla Ewell as Vicki Donovan, Daniel Gillies as Elijah Mikaelson, Claire Holt as Rebekah Mikaelson, Bianca Lawson as Emily Bennett and Joseph Morgan as Niklaus Mikaelson. Plot The episode starts with a flashback to 1490 Bulgaria where Katherine (Nina Dobrev) gave birth to her daughter, Nadia (Olga Fonda). Katherine's father took Nadia away from her right after she was born. Present day: Katherine is at the hospital after the heart attack she had suffered. Stefan (Paul Wesley) is there with her and when Nadia comes, he informs her that he compelled the doctors so he can take Katherine back home to be more comfortable. At the Salvatore house, Damon (Ian Somerhalder), Jeremy (Steven R. McQueen), Matt (Zach Roerig), Caroline (Candice Accola), Bonnie (Kat Graham) and Elena have a drinking game celebrating Katherine's upcoming death, naming the worst things she has ever done to them. Stefan walks in, asking them to stop because they are being insensitive. He instead drinks to the survivor Katherine rather than the evil one. Matt goes to get more liquor when Nadia shows up and knocks him down. She then goes back to the house where everyone is gathered and tells them that she found a way to save her mother but she needs some help. When they deny to help her, she says that she imagined what their answer would be and that is why she has buried Matt somewhere alive and she took his Gilbert ring. If they want to find him they should help her. Stefan and Elena follow Nadia to an abandoned house. On their way there, Nadia tells them her plan of how she will save Katherine. Katherine is born in a traveler bloodline and she can become one by getting into someone else's body; that is, if someone teaches her how to do the spell. Nadia is