	One of his most notable roles is that of mentally unstable recurring character James Hogan on "Cold Case". Mitchell also made appearances on "", "", "", "Burn Notice" as charming but unstable arms dealer Seymour, "Dexter", "Monk", "Six Feet Under", "X-Files", "The Closer", and "Boomtown". He also appeared on the show "" in the Season 6 episode "Room Service".