Dr. Tony Newman
Dr. Doug Phillips
Col. William Barrett Travis
Capt. Reynerson
Col. Jim Bowie
Dr. Armandez
Lt. Gen. Heywood Kirk
Dr. Raymond Swain
Dr. Ann MacGregor
Sgt. Garcia
Capt. Rodriguez (as Rodolfo Hoyos)
Mrs. Reynerson
Female in Alamo
Sentry
Sentry (uncredited)
Announcer (voice) (uncredited)