Cliff Robertson as Lt. Cmdr. Jeff Conway

Gia Scala as Karen Philips

Teru Shimada as Comm. Mori

Patricia Cutts as Lt. Peg Whitcomb

Gene Blakely as Lt. Len Ross

Rian Garrick as Al Schechter

L.Q. Jones as Yeoman Halliday

Robin Hughes as Maj. Jammy Harris

Gordon Jones as Torpedoman Bates

Tom Laughlin as Ens. Franklin

Robin Riley as Seaman Willies

Patrick Westwood as Simes

James Forrest as Australian Prisoner