Richard Widmark as Captain Eric Finlander, U.S.N.

Sidney Poitier as Ben Munceford

James MacArthur as Ensign Ralston, U.S.N.

Martin Balsam as Lieut Cmdr. Chester Potter, M.D., U.S.N.

Wally Cox as Seaman Merlin Queffle

Eric Portman as Commodore Wolfgang Schrepke, Deutsche Marine

Michael Kane as Commander Allison Executive Officer - Bridge

Gary Cockrell as Lieutenant Bascombe U.S.N. - C.I.C.

Phil Brown as Chief Hospitalman Mckinley - Sick Bay

Brian Davies as Lieutenant Beckman U.S.N. - Communications

Paul Carson as Seaman 1st Class - Communications

Ed Bishop as Lieutenant Hacker U.S.N. - Communications

Colin Maitland as Seaman Jones - Bridge

Paul Tamarin as Seaman 2nd Class - Bridge

Frank Lieberman as Seaman 1st Class - Bridge

James Caffrey as Seaman 1st Class - Bridge

Burnell Tucker as Seaman 1st Class - Bridge

Mike Lennox as Lieutenant Krindlemeyer U.S.N. - Bridge

Bill Edwards as Lieutenant Hazelwood U.S.N. - Bridge

Stephen Schreiber as Seaman 2nd Class - Bridge

Ronald Rubin as Seaman 1st Class - Bridge

Eugene Leonard as Seaman 2nd Class - Bridge

Roy Stephens as Seaman 2nd Class - C.I.C.

George Roubicek as Lieutenant Berger U.S.N. - C.I.C.

John McCarthy as Seaman 1st Class - C.I.C.

Shane Rimmer as Seaman 1st Class - C.I.C.

Glenn Beck as Seaman 2nd Class - C.I.C.

Laurence Herder as Petty Officer - Communications

Donald Sutherland as Hospitalman Nerney - Sick Bay

Warren Stanhope as Hospitalman Strauss - Sick Bay