The plot centers on a Traveler ritual intended to make the possession permanent, effectively "killing" Elena's soul to let Katherine live on in her place. 2. The Collapse of Damon’s Redemption
A major subplot involves regression. This episode marks a dark turning point for his character. Vampire Diaries, Season 5, Episode 12: The Devil Inside Watch The Vampire Diaries S05E12 HDTV XviD-AFG ...
The episode hinges on dual performance. For the first time, the conflict is internal; Elena is trapped within her own mind while Katherine pilots her life. The plot centers on a Traveler ritual intended