Christopher Heyerdahl is a Canadian actor best known for his recurring role as Todd the Wraith in the television sci-fi series Stargate: Atlantis, from 2004-2009.
He currently stars as Thor "The Swede" Gundersen, Thomas Durant's ruthless head of security, in the period drama western television series Hell on Wheels, since 2011.
During the production of Hell on Wheels, Heyerdahl was concurrently shooting the fourth season of the Syfy series Sanctuary in which he plays the dual roles of John Druitt and Bigfoot.
As a member of a secretive group who tested the limits of science in the 19th century, Druitt has the ability to teleport at will along with the secret identity of Jack the Ripper.
On the feature film front, Heyerdahl can be seen as the ancient vampire Marcus in the popular Twilight series.
Born in British Columbia, Heyerdahl is known internationally for his powerful performances in film, theatre and television. His previous credits include roles as H.P. Lovecraft in the Gemini award winning Out Of Mind: The Stories Of H.P. Lovecraft, The Ghosts of Dickens' Past in which he starred as Charles Dickens, The Education Of Little Tree and Blade: Trinity.
Fluent in French, he also starred in Le Dernier Tunnel, Cadavres and La Loi Du Cochon.
Heyerdahl also has an impressive list of television credits to his name, and has had recurring guest roles on such popular television shows as Supernatural, Caprica, Smallville, Human Target, Stargate Atlantis, the award-winning children's series Are You Afraid of the Dark? as well as Steven Spielberg's Emmy and Golden Globe winning mini-series Into the West.
In 2010 and 2006 Heyerdahl won Leo Awards for Best Supporting Performance by a Male in a Dramatic Series for Sanctuary; and Best Guest Performance by a Male in a Dramatic Series respectfully for his performance as Jan Van Der Heyden in The Collector.
Additionally, he garnered a Leo nomination in 2009 for Best Supporting Performance by a Male in a Dramatic Series for Sanctuary - Revelations Part 2 and a Gemini Award nomination for Best Performance by an Actor in a Guest Role in a Dramatic Series, also for Sanctuary.
On stage, Heyerdahl has a long list of theatre credits including Love's Labour's Lost, The Changeling and Knight of the Burning Pestle at the Stratford Shakespeare Festival, The Glace Bay Miners' Museum, The Last Comedy, and Savage/Love, to name a few.
Renowned explorer and author Thor Heyerdahl was his father's cousin.