THURSDAY, APRIL 15

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

"Under Control" (CONTENT RATING TBD) (HDTV)

DAVID ANDERS ("24") GUEST STARS AS ELENA'S UNCLE JOHN GILBERT - While Stefan (Paul Wesley) struggles to control his new situation, Elena (Nina Dobrev) and Jeremy (Steven R. McQueen) are surprised by a visit from their uncle, John Gilbert (guest star Anders). Alaric (Matt Davis) has an awkward talk with Elena about Isobel. At a Founder's Day event, Stefan displays a rare party attitude and Damon's (Ian Somerhalder) attempt to find out why Uncle John has returned to town takes an ugly turn. An incident at the party causes trouble between Matt (Zach Roerig) and Tyler (Michael Trevino), and the relationship between Matt and his mother, Kelly (guest star Melinda Clarke), reaches a new low. Meanwhile, Elena's effort to comfort Jeremy falls short and he decides to take matters into his own hands. Sara Canning also stars. David von Ancken directed the episode written by Barbie Kligman & Andrew Chambliss (#117).