Ralph Meeker
— Capt. David Malcolm
Marla English
— Zara
J. Carrol Naish
— Sgt. Diepel
John Smith
— Pvt. Rex Tyle
John Carradine
— Jala
Keith Larsen
— El Zanal
Lita Milan
— Alita
Philip Tonge
— Cpl. McTavish
Ron Randell
— Pvt. Havers
Nico Minardos
— Gerard
Otto Waldis
— Gabin
Peter Mamakos
— Pvt. Lucia Capella
Jarl Victor
— Lt. Gina Mackie
Aaron Saxon
— Tamal
Albert Carrier
— Ducco
Terence de Marney
— Kramer (uncredited)
Marc Cavell
— El Zanel as a Boy (uncredited)
Rudy Germane
— Legionnaire (uncredited)
Joseph Waring
— Dylak Spokesman (uncredited)
Al Wyatt Sr.
— Arab (uncredited)
Joe Yrigoyen
— Arab (uncredited)
Joseph DeCorse
— Arab (uncredited)
Mort Mills
— Wolock - Radio Man (uncredited)
Bela Kovacs
— Maj. Henri Panton (uncredited)
Linda Sue Rowen
— Arab Girl (uncredited)
Peter Bourne
— Weems (uncredited)
Ben Wright
— Commandant Captain (uncredited)
Peter Norman
— Dr. Kleiner (uncredited)