Christopher Heyerdahl's time in "Supernatural" was, in the grand scheme of things, shorter than a cup of coffee. That being said, his performance as the demonic Alastair made a positive impression on the show's fans and cast members alike. According to the True Blood fandom, he was singled out for praise by Jensen Ackles at the 2011 Supernatural Convention in Los Angeles, who claimed that Heyerdahl "out-acted" him during their scenes together.
"Supernatural" — which chronicles the adventures of two brothers as they hunt demons, angels and other creatures that pose a risk to humanity — gave Heyerdahl an important role, even if it was a short-term one. His character was essentially the most infamous and sadistic torturer in Hell, and he got to know Dean (Ackles) quite intimately during the hunters' time in the underworld during the third season.
Heyerdahl was one of three performers to bring the spooky character to life during the show's run. Mark Rolston and Andrew Wheeler were also pretty memorable in their own right.
