Don Hany

as George Barlin (6 episodes)

as Roger Simms (1 episode)

as Kyle (8 episodes)

as Doctor MacKenzie (6 episodes)

as Self (1 episode)

as Mahdi

as Raph (3 episodes)

as Ewan Garrity (6 episodes)

as Dr. Jessie Shane (10 episodes)

as Bishop Quaid (6 episodes)

as Viktor Khadem

as Joe Cashin

as Sam Callaghan (10 episodes)

as Adam Bourke (2 episodes)

as Dave Gwynne

as Nik 'The Russian' Radev

as Joel

as Spiros Georgiades (6 episodes)

as Dion Pesci (5 episodes)

as John Mather

as Sergei Krousov

as Sergei Krousov (2 episodes)

as Captain Ensor (1 episode)

as Bobby Lavilla (1 episode)