Simon Scott

as Captain of Submarine, USS Sailfin

as Dr. Baylor

as Johnson

as Capt. Harvey Adam

as Hugh Gaynor

as McGuffin

as Capt. Floyd Henderson (uncredited)

as Jim Slade (Divorce Lawyer) (uncredited)

as Carl Hastings

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

as District Attorney

as Capt. Dawson

as Stanley Overton

as Elliot Dunbar

as Gregory McGill

as Martin Pierce

as Jim Cardoff

as Warren Stuart

as John Lovell

as Maj. Wilson

as Harbald

as Dr. Barto

as Dr. Samuel Abbott

as Mr. Rogers