Xander Berkeley

Alexander Harper Berkeley (born 1955) is an American actor. Since beginning his career in the early 1980s, he has appeared in over 200 film and television projects. His films include ''Terminator 2: Judgment Day'' (1991), ''Candyman'' (1992), ''Barb Wire'' (1996), ''Air Force One'' (1997), ''Gattaca'' (1997), and ''Shanghai Noon'' (2000). He also appeared in the crime dramas ''L.A. Takedown'' (1989) and its remake ''Heat'' (1995), although he played a different character in each film. On television, he headlined the Citytv psychological thriller ''The Booth at the End'' (2010–2012) and was a series regular on the Fox action drama ''24'' (2001–2003) and The CW action thriller ''Nikita'' (2010–2012). As a guest star, Berkeley portrayed Sheriff Thomas McAllister on the CBS drama ''The Mentalist'' (2008–2013) and Gregory on the AMC post-apocalyptic horror ''The Walking Dead'' (2016–2018). Provided by Wikipedia