Christopher Heyerdahl

Christopher Heyerdahl (born September 18, 1963) is a Canadian actor who portrayed Alastair in Supernatural, the Wraith Todd in Stargate Atlantis, Sam in Van Helsing, "Swede" in Hell on Wheels, and Marcus in The Twilight Saga.

Castle · S5, E16

Hunt (2)

After the FBI fails to get Alexis back, Castle takes matters into his own hands; Castle learns that his daughter's kidnapping may be a part of a larger and more sinister agenda.
Supernatural · S4, E16

On the Head of a Pin

Castiel and Uriel ask Dean to use the torturing skills he learned in hell to extract information from Alastair; Dean's world is shattered when Alastair reveals shocking information.
Supernatural · S4, E15

Death Takes a Holiday

Sam and Dean investigate a town where people are cheating death and discover that the Reapers have gone missing.
True Blood · S5, E5

Let's Boot and Rally

With time running short, Bill and Eric enlist Sookie to probe for clues on Russell's hiding place. Unable to deal with the demon magic inside him, Lafayette calls out to Jesus' spirit for help. Patrick Devins and Terry are held hostage in the bunker of their Iraq War buddy Brian Eller. Jason wakes to a disturbing dream; Jessica gives Tara advice on adjusting to vampire life; Sam visits Luna with news about the deaths of their shape-shifter friends.