Tahmoh Penikett is a Canadian actor best known for his roles in science fiction television series. He gained popularity for portraying Karl Agathon in the critically acclaimed series Battlestar Galactica, which aired from 2004 to 2009. His performance earned him a dedicated fan base and recognition in the genre. In addition to his work on Battlestar Galactica, Penikett has appeared in various other television shows, including Supernatural and The Killing. He has also acted in films and has lent his voice to video games, showcasing his versatility as an actor across different media.