Gerald McRaney
Gerald Lee Mac McRaney is an American television and movie actor. McRaney is best known as one of the stars of the television shows Simon amp Simon, Major Dad, and Promised Land. He was a series regular for the first season of Jericho, and the final season of Deadwood. He stars in a recurring role and new main antagonist Mason Wood aka Locksat in Castle season 8.
McRaney was born in Collins, Mississippi, the son of Clyde McRaney and Edna McRaney. He is of Scottish and Choctaw ancestry. He attended college at the University of Mississippi. Before hitting it big as an actor, McRaney worked in the Louisiana oil fields.
Source: Wikipedia