S7, E10: After finding himself on the wrong end of Julian's (recurring guest star TODD LASANCE) plan to avenge Lily's (recurring guest star ANNIE WERSCHING) death, Damon awakens to find himself trapped inside the Phoenix stone. There, Damon is 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.