Christopher Heyerdahl

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.

WIKIPEDIA

THE LAST OF US · S1, E1

When You're Lost in the Darkness

2003. As a parasitic fungal outbreak begins to ravage the country and the world, Joel Miller attempts to escape the escalating chaos with his daughter and brother. Twenty years later, a now hardened Joel and his partner Tess fight to survive under a totalitarian regime, while the insurgent Fireflies harbor a teenage girl with a unique gift.
STARGATE ATLANTIS · S1, E3

Hide and Seek

Dr. Rodney McKay (David Hewlett) undergoes experimental gene therapy altering his DNA to match the Ancient genetic coding. The experiment opens up countless scientific possibilities as well as an unexpected problem. Meanwhile during a game of hide and seek one of the Athosian children inadvertently opens a containment unit that lets loose a seemingly harmless black ethereal cloud. But when Atlantis goes through a series of technical malfunctions they realize that the shadowy creature is actually feeding off of the power supply!
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.
STARGATE ATLANTIS · S1, E4

Thirty Eight Minutes

Fleeing from a surprise encounter with the Wraith Major Sheppard (Joe Flanigan) falls victim to an alien symbiote which is feeding off his life force and slowly paralyzing him. While speeding back to Atlantis for medical aid the team gets trapped halfway through the Stargate when the puddle jumper damaged in the altercation with the Wraith suffers a mechanical failure. With only thirty-eight minutes before the Stargate shuts down Lieutenant Ford (Rainbow Sun Francks) and Dr. McKay (David Hewlett) struggle to manually fix the problem. As the clock ticks away the Atlantis team must come together or perish in the harsh vacuum of space.
CASTLE · S5, E16

Hunt

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.