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.

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.
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.
Scorpion · S3, E21

Rock Block

The team defies the orders of a foreign government when it retrieves an asteroid containing DNA strands that could have deadly consequences if they are exposed.
Stargate Atlantis · S1, E3

Hide and Seek

As the crew explores Atlantis, it accidentally unleashes a dark entity that threatens to drain the city's power supply.
Stargate Atlantis · S1, E4

Thirty-Eight Minutes

The Atlantis team is in danger when the puddle jumper lodges in the Stargate.

Christopher Heyerdahl

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