Peter Tompkins as The Investigator

Will Knickerbocker as Lt. Cmdr. Whorley

Fred Buch as Dr. Asper

Jack Nagle as Consul Gottschalk

John Lawrence as Ensign #1

Phil Goble as Ensign Cain

Jim Marsh as Executive Officer Forbes

Dave Kraul as Ensign Hoffman

Lou Colombo as Murderer

Jim Hess as Capt. Robert Lindquist

Robert Garrison as Co-Pilot Hill

Janet Raney as Stewardess Mary Burke

Michael W. Schwartz as Controller

Víctor Villa as Aviation Chief

Jerry Mann as Dan Burak

Ray Crawford as Father Horgan

Gregory Bayless as Sgt. Robert Gallivan

John Dodson as Pfc. YoYo Gruebel

Timothy Miller as Pfc. Joseph Delman

Eric Henshaw as Lt. Taylor

Harry Frank Porter as Duty Officer

Steven Uzzel as Lt. Robert Cox

James R. Geeting as Capt. Edward Powers

Charles Lucia as Dinner Key #1 (as Chip Lucia)

Randy Stone as Dinner Key #2

Joe Bernardoni as Controller #1

Roger Gorton as Controller #2