The Vampire Diaries - Season 7 Episode 10 : Hell Is Other People 2017

After finding himself on the wrong end of Julian's plan to avenge Lily's death, Damon awakens to find himself trapped inside the Phoenix stone, tormented by a traumatic experience from his time in the Civil War and forced to face his darkest demon in order to get out. On the outside, Bonnie is in a race against the clock to get Damon out before the effects of the Phoenix stone take over and leave him changed forever.