Graham McTavish (born 1961) is a Scottish television actor. He played the character of Warden Ackerman in "Red Dwarf" in five episodes of the eighth season. McTavish also had numerous supporting roles in British dramas and films such as "Casualty," "Jekyll," "Bill," "Taggart," and "Sisterhood." He also played the hot-tempered mercenary commander Lewis in "Rambo," had the role of drill sergeant Desmond in the fourth season of "Lost," appeared in "Ali G Indahouse" as a customs officer, and played a Russian pirate in "Sea Patrol." He played Ferguson in 4 episodes of season 4 of "Prison Break." He also appeared in the film "Green Street 2," which was released on March 23, 2009. McTavish voiced and performed motion capture for the evil psychopathic war criminal Zoran Lazarevic in "Uncharted 2: Among Thieves," voiced the protagonist Dante Alighieri in "Dante's Inferno," the Restoration leader Commander Lucius in the video game "Shadow Complex," and the Decepticon Thundercracker in "Transformers: War for Cybertron." He played Russian Foreign Minister Mikhail Novakovich in the eighth season of "24," and also voiced the Marvel Comics villain Loki in "Hulk vs. Thor" and "The Avengers: Earth's Mightiest Heroes."

McTavish was also cast in the upcoming film "The Wicker Tree," the long-awaited sequel by Robin Hardy to the 1973 film "The Wicker Man," and in the role of Dwalin in the long-awaited "The Hobbit."

The above description is from the Wikipedia article "Graham McTavish," licensed under CC-BY-SA, the full list of authors is in Wikipedia