The Vampire Diaries 6×04 “Black Hole Sun” – When Damon (Ian Somerhalder) and Bonnie (Kat Graham) realize that uncovering a time in Damon’s past may provide clues to finding their way home, Damon is forced to relive one of the worst days of his life. After an awkward run-in with Jo (guest star Jodi Lyn O’Keefe) at the hospital, Alaric (Matt Davis) steps in to help Jeremy (Steven R. McQueen) get his life together and cope with the loss of Bonnie. Elsewhere, Stefan (Paul Wesley) attempts to show Elena (Nina Dobrev) what it’s like to start over and create a new identity, while an unsuspecting Matt (Zach Roerig) finds himself in a disturbing situation when Tripp (guest star Colin Ferguson) lets him in on a dark secret. Lastly, Stefan, who is desperate to regain some normalcy in his life, is stunned when an unexpected visitor shows up. Michael Malarkey also stars. Kellie Cyrus directed the episode written by Melinda Hsu Taylor & Neil Reynolds (#604). Original airdate 10/23/2014.