“The Vampire Diaries”: Klaus to appear April 21

"Klaus" - Joseph Morgan as Klaus in THE VAMPIRE DIARIES on The CW. Photo: Bob Mahoney/The CW ©2011 The CW Network, LLC. All Rights Reserved.

The infamous original vampire Klaus will finally make an appearance on the April 21 episode of “The Vampire Diaries.”

He will be played by Joseph Morgan.

The “Klaus” episode synopsis, provided by The CW, is as follows:

Stefan (Paul Wesley) and Damon (Ian Somerhalder) are furious when they discover that Elena (Nina Dobrev) has defied them both to make a new ally and take control of the plan to out-maneuver Klaus (Morgan).  Disagreement over how to protect Elena leads to growing tension between the Salvatore brothers. Meanwhile, Stefan has his hands full trying to keep a confused and frightened Jenna (Sara Canning) safe.  Flashbacks to 1491 reveal Katherine’s (Nina Dobrev) introduction to Elijah (Daniel Gillies) and Klaus, along with the origin of the moonstone curse.  Elena learns shocking new information about Klaus’ motives. Matt Davis also stars.  Joshua Butler directed the episode written by Kevin Williamson & Julie Plec.

To view a web gallery of photos from this episode, click here.

(Photo Credit: Bob Mahoney / The CW)

“The Vampire Diaries” airs at 7 p.m. Thursdays on The CW.