The Vampire Diaries 6x17 Guide

Damon struggles with the reality of his mother’s past. While he hopes she can help "bring back" Stefan, he is forced to lie to her about bringing her "traveling companions" (the Heretics) back to the modern world. Caroline & Stefan

Damon, Elena, Bonnie, and Kai travel to the 1903 Prison World to rescue Damon’s mother, Lily Salvatore. The Vampire Diaries 6x17

While in the prison world, Bonnie lures Kai into a trap. She leaves him behind in 1903 as payback for the torture he put her through in the 1994 world. Damon struggles with the reality of his mother’s past

Caroline tries to maintain her "organized" lifestyle without humanity, but Stefan finds it embarrassing. He eventually succeeds in breaking her resolve, forcing her to fully give in to her darker impulses. While in the prison world, Bonnie lures Kai into a trap

The Vampire Diaries season 6 episode 17 review - Den of Geek

Unlike the saintly figure Damon remembered, Lily is revealed to be a Ripper who has been trapped for over a century. She survives on just two drops of blood a week to maintain her sanity.