Brian Hallisay

as Mason

as Doug Kendall (7 episodes)

as Capt. Gillespie

as Mark

as Ben Odell (4 episodes)

as Kyle Parks (22 episodes)

as Scott

as Ben Hunter (23 episodes)

as Agent Pettibone (2 episodes)

as Craig Cameron (1 episode)

as Sebastian Davis (10 episodes)

as Chris Dunbar (1 episode)

as Morgan (1 episode)

as William Davis (18 episodes)

as Dr. Mark Stevens (1 episode)

as Hayden Field

as Ben Michaelson (1 episode)

as Jake Carrington (1 episode)

as Sean Covey (1 episode)

as Emery Gable (1 episode)

as Jimmy Bruno (1968) (1 episode)

as David Crocker (1 episode)

as Alex Stark (1 episode)

as Dr. George Harmon (1 episode)