The Vampire Diaries - 5x21 "Promised Land" Official Synopsis

OUTRUNNING DEATH — When Stefan (Paul Wesley) and Elena (Nina Dobrev) escape from Markos’ (guest star Raffi Barsoumian) control, only to find themselves stranded in a remote location, Stefan gets philosophical with Elena about her relationship with Damon (Ian Somerhalder).  After their attempt to protect the dopplegangers goes badly, Liv (guest star Penelope Mitchell) and Luke (guest star Chris Brochu) come up with a dangerous new strategy.  Damon recruits Matt (Zach Roerig) and Jeremy (Steven R. McQueen) to help him set a trap for Markos, who turns out to have a devastating surprise of his own.  Bonnie (Kat Graham) finally admits to Caroline (Candice Accola) that she’s been keeping the truth about the Other Side from everyone.  Finally, while Bonnie searches desperately for a way to stop Markos, Caroline is witness to an unthinkable act of violence by one of the Travelers.  Michael Allowitz directed the episode written by Rebecca Sonnenshine (#521).