Hugh O'Brian
— Killian
Anne Francis
— Jean Marshek
Marilyn Maxwell
— Maude Webber
Marie Windsor
— Lottie Clampett
Sherry Jackson
— Nancy Belacourt
Robert F. Simon
— Col. Donahue
Richard Kelton
— Lt. Charring
Cynthia Hull
— Mit-O-Ne
Pepe Callahan
— Lt. Santos, the Mexican
Ed Call
— Sgt. Frame
John A. Neris
— Sgt. Elmer Cass
Troy Melton
— Cpl. Isham
Joseph Kaufmann
— Pvt. Bishop
Chuck Hicks
— Cpl. Hearn
Jim Boles
— Warden
Michael Keep
— Cadete, the Mescalero
Loie Bridge
— Margie Britt
Kaye Elhardt
— Mary Kroll
Pedro Regas
— Old Indian