Paul Maxwell

as Colonel Steve Zodiac (voice)

as Colonel Steve Zodiac / Mrs Doughty (voice)

as Steve Zodiac / Captain Grey (voice)

as Barrington Cabot

as Barrington Cabot

as Capt. Calvelli

as Panama Hat

as Dr. Wallace

as Mylos

as Esterbrook

as Bill Freed

as Andrew Tolliver

as Agent Hopkins

as Lt.Gen. Geoffrey Keyes

as Van Leuwen

as Mace

as Scott Benson

as Sheepherder No. 1

as Bill Freed

as Captain Grey / Breck (voice)

as Captain Grey / World President / Fire Chief (voice)

as Eugene Hellman

as Buzz Wepner

as Maj. Gen. Maxwell D. Taylor

as CIA Director

as Submarine Captain

as Colonel Fischer

as Doctor Chilton

as Mr Baxter

as Paul

as American Tourist (voice) (uncredited)

as Don Fleming

as Sam Webber

as Connors

as Jim Lewis

as CIA Man

as Elijah Baley

as Capt. Baxter

as Steve Crandall

as World President (voice)

as Captain Grey / DT19 Pilot (voice)

as Captain Grey / 1st Policeman (voice)

as Captain Grey / Guard (voice)

as General Ward (voice)

as Captain - USS Panther II (voice)

as Captain Grey / General Tiempo / Porter Benson (voice)

as Supreme Commander of Earth Forces (voice)

as Fire Chief (voice)

as Base Commander (voice)

as Captain Grey / Breck (voice)

as 1st Policeman (voice)

as Judson Murphy

as Jim Perkins

as Captain Paul Travers (voice)

as Lieutenant John E Donovan

as Captain Paul Travers

as Mike Foster

as Al Stevens

as Major Smith

as Bill Martin

as Commander Spelling U.S.N.

as Bud Fredericks (uncredited)

as C.M.A.A.

as Colonel Steve Zodiac (voice)

as Kolben

as Colonel Cutler

as Perez

as Craig Owen

as Doyle

as Colonel Doyle

as Lt. Cmdr. Bill Hallohan

as Maj. Russell

as Jeffrey Clayton

as Mike, assistant coroner

as Jim Landry

as Andy Markham

as Doctor (uncredited)

as Walalce Westrey

as Detective Sgt. Singer

as Lab Technician

as Saul

as Dr. Jack Russell

as Captain Grey (voice)