THURSDAY, AUGUST 15

THE VAMPIRE DIARIES (8:00p.m.-9:00 p.m. ET)

"Stand by Me" (TV-14, LV) (HDTV)

THE TERRIBLE TRUTH - When Stefan (Paul Wesley) arrives back in Mystic Falls with Elena (Nina Dobrev) and Jeremy (Steven R. McQueen), Caroline (Candice Accola) is immediately worried about Elena's state of mind. Stefan reaches out to Dr. Fell (guest star Torrey DeVitto) and Matt (Zach Roerig) for help. Still on the island, Damon (Ian Somerhalder) relays somber news to Rebekah (Claire Holt), and is surprised at her reaction. Together, Damon and Rebekah learn an unexpected bit of recent history from Vaughn (guest star Charlie Bewley). Everyone is horrified when Bonnie (Kat Graham) reveals the rest of Shane's (guest star David Alpay) plan. Finally, after Damon does his best to help her, Elena comes up with a plan of her own. Lance Anderson directed the episode written by Julie Plec (#415).