Tahmoh Penikett

Tahmoh Penikett is a Canadian actor. He is known for playing Karl "Helo" Agathon on SyFy's 2004 television series Battlestar Galactica. He has appeared in TV series Supernatural, Dollhouse, and the Showcase time travel show, Continuum.

Man of Steel
2 Hearts
Gods of Youth
Trick 'r Treat

Supernatural

Castle · S5, E1

After the Storm

Castle and Beckett set aside questions about their relationship in order to take on the forces responsible for Beckett's mother's murder.
Castle · S4, E23

Always

Castle tries to protect Beckett as she pursues the man who shot her; the 12th precinct is forever changed as feelings and secrets are revealed.
Criminal Minds · S9, E14

200

When J.J. is abducted, the team looks into her time at the State Department in hope of finding clues regarding her disappearance.
Supernatural · S9, E1

I Think I'm Gonna Like It Here

In the ninth season premiere, Dean is frantic after Sam collapses and the doctor tells Dean his brother won’t make it. Desperate, Dean sends out an “All Points Bulletin” via prayer to every angel in the area – asking them to help his brother. In exchange, Dean will owe that angel a favor. Numerous angry angels race to find and kill Dean, but one, Ezekiel (guest star TAHMOH PENIKETT), gets to him first. Meanwhile, Sam fights for his life, facing some familiar demons in the struggle; and Castiel struggles to survive without powers.