We don't have a biography for Niklaus "Klaus" Mikaelson yet. Hang in there, or go ahead and contribute one.
Appearances
The Vampire Diaries
Main cast, played by Joseph Morgan
- Episode 3x01: The Birthday (Sep 15, 2011)
- Episode 3x02: The Hybrid (Sep 22, 2011)
- Episode 3x03: The End of the Affair (Sep 29, 2011)
- Episode 3x04: Disturbing Behavior (Oct 6, 2011)
- Episode 3x05: The Reckoning (Oct 13, 2011)
- Episode 3x08: Ordinary People (Nov 3, 2011)
- Episode 3x09: Homecoming (Nov 10, 2011)
- Episode 3x10: The New Deal (Jan 5, 2012)
- Episode 3x11: Our Town (Jan 12, 2012)
- Episode 3x12: The Ties That Bind (Jan 19, 2012)
- Episode 3x13: Bringing Out the Dead (Feb 2, 2012)
- Episode 3x14: Dangerous Liaisons (Feb 9, 2012)
- Episode 3x15: All My Children (Feb 16, 2012)
- Episode 3x18: The Murder of One (Mar 29, 2012)
- Episode 3x19: Heart of Darkness (Apr 19, 2012)
- Episode 3x20: Do Not Go Gentle (Apr 26, 2012)
- Episode 3x21: Before Sunset (May 3, 2012)
- Episode 3x22: The Departed (May 10, 2012)
- Episode 4x01: Growing Pains (Oct 11, 2012)
- Episode 4x03: The Rager (Oct 25, 2012)
- Episode 4x04: The Five (Nov 1, 2012)
- Episode 4x05: The Killer (Nov 8, 2012)
- Episode 4x06: We All Go a Little Mad Sometimes (Nov 15, 2012)
- Episode 4x07: My Brother's Keeper (Nov 29, 2012)
- Episode 4x09: O Come, All Ye Faithful (Dec 13, 2012)
- Episode 4x10: After School Special (Jan 17, 2013)
- Episode 4x11: Catch Me If You Can (Jan 24, 2013)
- Episode 4x12: A View to a Kill (Jan 31, 2013)
- Episode 4x13: Into the Wild (Feb 7, 2013)
- Episode 4x14: Down the Rabbit Hole (Feb 14, 2013)
- Episode 4x15: Stand by Me (Feb 21, 2013)
- Episode 4x16: Bring It On (Mar 14, 2013)
- Episode 4x17: Because the Night (Mar 21, 2013)
- Episode 4x18: American Gothic (Mar 28, 2013)
- Episode 4x19: Pictures of You (Apr 18, 2013)
- Episode 4x20: The Originals (Apr 25, 2013)
- Episode 4x21: She's Come Undone (May 2, 2013)
- Episode 4x23: Graduation (May 16, 2013)
Guest cast, played by Joseph Morgan
- Episode 2x19: Klaus (Apr 21, 2011)
- Episode 2x20: The Last Day (Apr 28, 2011)
- Episode 2x21: The Sun Also Rises (May 5, 2011)
- Episode 2x22: As I Lay Dying (May 12, 2011)
- Episode 5x11: 500 Years of Solitude (Jan 23, 2014)
- Episode 5x12: The Devil Inside (Jan 30, 2014)
- Episode 7x14: Moonlight on the Bayou (Feb 26, 2016)