<P> Aaron does not know what is going on so he asks Wes for explanations . Wes admits that his real work is to study vampires and that Elena is a vampire that is why he did what he did to her . He also tells Aaron about the Augustine and that his father was also a member of it . He says that it is his legacy to continue what his father was trying to do but when he tells him that his parents were killed by vampires and not animals, Aaron freaks out more, he hits Wes, takes a gun and leaves . </P> <P> As Elena wakes up, she asks Damon what is going on and he informs her that he has been there before . Damon starts narrating her about what happened to him and what Augustine members did to him . Via flashbacks we see the story . </P> <P> Back in 1953, Joseph Salvatore (Judd Lormand) calls Damon to come home in Mystic Falls . The reason he did it is because he was paid from the Augustine members . He shoots Damon up with vervain but before Damon passes out he stabs him in the neck . A man appears named Dr. Whitmore (Trevor St. John) who informs Damon he will be his doctor from now on . Dr. Whitmore is Aaron's grandfather . From that moment Damon becomes an object for scientific study which means getting tortured by Dr. Whitmore in order for the humans to find out vampires' strength and abilities . </P> <P> Damon was captive for five years before he manages to escape . What kept him sane was another vampire who was also captured ten years before Damon, named Enzo (Michael Malarkey). The two became friends and he was the one who helped him plan their escape, a plan that would set in practice the one day the people who keep them, take them out of their cells . Dr Whitmore takes Damon out and he attacks everyone . After killing them, he tries to free Enzo as well but he cannot do and he leaves him behind . He does not want to try more since if he stays they will either capture him again or get burn by the fire that was started in the room . Damon leaves Enzo behind, believing he died in the fire . </P>

When does damon get out of the cell