The tension between the two brothers rises as they fight over how to protect Elena from the oldest vampire in history.
Klaus is seriously threatening the relationships among "The Vampire Diaries" characters in the upcoming episode. After possessing Alaric, the oldest vampire in history will indirectly reignite a fight between Stefan and Damon as they disagree about how to protect Elena.
Stefan and Damon are furious when they discover that Elena has defied them both to make a new ally and take control of the plan to out-maneuver Klaus. Meanwhile, Stefan has his hands full trying to keep a confused and frightened Jenna safe.
The episode will also feature flashbacks to 1491 which reveal Katherine's introduction to Elijah and Klaus, and the origin of the moonstone curse. The first look at Klaus from present day has just been obtained by TVLine in form a picture showing Joseph Morgan's character on the woods.
"Klaus" will air Thursday, April 21 at 8 P.M. on The CW.