Xander Berkeley

Alexander Harper "Xander" Berkeley (born December 16, 1955) is an American actor. He is best known for his television roles as George Mason on 24, Sheriff Thomas McAllister on The Mentalist, Percy Rose on Nikita, the Man on The Booth at the End and Gregory on The Walking Dead.

Xander Berkeley
Berkeley in October 2016
Born	Alexander Harper Berkeley (1955-12-16) December 16, 1955 (age 70) Brooklyn, New York, U.S.
Occupation	Actor
Years active	1981–present
Spouse	Sarah Clarke ​ (m. 2002)​
Children	2

His movie roles include Christopher Crawford in Mommie Dearest, Todd Voight in Terminator 2: Judgment Day, Trevor Lyle in Candyman, Ralph in Heat, Agent Gibbs in Air Force One and Dr. Lamar in Gattaca.^[1]