Simon Scott

as Dr Patrick Knight (1 episode)

as Captain (1 episode)

as Arnold Slocum (110 episodes)

as Metcalf

as Dr. Baylor

as Gen. Phil Spencer - Chairman of the Joint Chiefs of Staff

as Robert Ten Broeck Stevens

as Luftwaffe General

as Sam Tucker (1 episode)

as Col. Barnes

as Gregory McGill (1 episode)

as Dr. Barto (1 episode), as Dr. Samuel Abbott (1 episode)

as Capt. Dawson

as Jackson Wyndham (1 episode)

as McGuffin

as Hugh Gaynor

as Col. Anderson

as Gen. Mitchell Stevenson (1 episode)

as Mr. Kandiss

as Arthur Ferris (1 episode)

as George Harrington

as Harbald (1 episode)

as General Jomar

as Jim Cardoff (1 episode), as Warren Stuart (1 episode), as John Lovell (1 episode)