Someone is not "Under Control" in the next "Vampire Diaries". At a Founder's Day event, Stefan displays a rare party attitude. While Stefan struggles to control his new situation, Elena and Jeremy are surprised by a visit from their uncle, John Gilbert.
Meanwhile, Damon's attempt to find out why Uncle John has returned to town takes an ugly turn. Alaric has an awkward talk with Elena about Isobel. An incident at the party causes trouble between Matt and Tyler, and the relationship between Matt and his mother, Kelly, reaches a new low. In the meantime, Elena's effort to comfort Jeremy falls short and he decides to take matters into his own hands.
"Under Control" airs on April 15. Beside releasing the preview of the upcoming episode, The CW has also aired a short promo dubbed "Smoldering".