Anecdotes

He was praised by his former Supernatural (2005) co-star, Jensen Ackles, at the LA Supernatural Convention in 2011. Ackles says that during the torture scene of Christopher's character "Alastair", Ackles was thinking "Wow, I'm totally being out-acted here", after that Ackles turns to the audience and asks them "I mean, wasn't he good?" The audience replies with massive applause.

He is half Norwegian and half Scottish.

Thor Heyerdahl is a cousin of his father.

Has played a vampire leader on Van Helsing (2016), True Blood (2008) and Twilight: Chapitre 2 - Tentation (2009). Has also played a demon on Supernatural (2005).

Such a big fan of KISS (Ace Frehley in particular), Heyerdahl incorporated Frehley's Starman makeup as a tattoo of his character "Todd" in Stargate Atlantis.

Has appeared with Ryan Robbins on four different series: Stargate: Atlantis (2004), Sanctuary (2008), Caprica (2009) and Hell on Wheels: L'Enfer de l'Ouest (2011).

Has appeared with Michael Shanks and Amanda Tapping on three different series: Stargate SG-1 (1997), Stargate: Atlantis (2004) and Sanctuary (2008).

Appeared as villains on both Smallville (2001) and Gotham (2014). Both series are based on the early years of iconic DC superheroes (Superman and Batman).

Tortures one of the main characters in both True Blood (2008) (portraying vampire Dieter) and in Supernatural (2005) (portraying demon Alastair).

Performed at Canada's Stratford Festival in 1989 and 1990.

Nephew-in-law of Jacqueline Beer.