Silas Weir Mitchell is an American character actor known for playing disturbing or unstable characters.
He has had recurring guest roles in the first season of 24 (as Eli Stram), My Name Is Earl (as Earl's ex-con friend Donny Jones), and Prison Break (as escapee Charles "Haywire" Patoshik). On the DVD commentary for Prison Break, he mentions he had previously auditioned on Prison Break for the roles of Theodore "T-Bag" Bagwell and Lincoln Burrows. Mitchell plays the role of an insane prisoner in both Prison Break and My Name Is Earl. He also played the role of the keymaker in the movie Rat Race and appears in The Whole Ten Yards. One of his most notable roles was that of mentally unstable recurring character James Hogan in Cold Case. Mitchell also made appearances on CSI: Miami, CSI: NY, Law & Order: SVU on Burn Notice as unstable arms dealer Seymour, Dexter, Monk, Six Feet Under, X-Files, The Closer and Boomtown. He also appeared on the show CSI in season six, in the episode "Room Service". Silas made an appearance in the US cop show The Shield in 2008, in its seventh and final season. In October 2011, Mitchell began appearing in the NBC's TV series Grimm.
He appeared in the 2009 films A Fork in the Road, alongside Jaime King, and Halloween 2. Mitchell also appeared in Fox's TV show, Mental with Chris Vance, also from Prison Break.