Characters played by Gregory Peck
Capt. Richard Lance
Characters played by Barbara Payton
Cathy Eversham
Characters played by Ward Bond
Cpl. Timothy Gilchrist
Characters played by Gig Young
Lt. William Holloway
Characters played by Lon Chaney Jr.
Trooper Kebussyan
Characters played by Neville Brand
Sgt. Ben Murdock
Characters played by Jeff Corey
Joe Harmony
Characters played by Warner Anderson
Trooper Rutledge
Characters played by Steve Brodie
Trooper Onstot
Characters played by Dan Riss
Lt. Jerry Winters
Characters played by Terry Kilburn
Trooper Saxton
Characters played by Herbert Heyes
Col. Drumm
Characters played by Art Baker
Capt. Jennings
Characters played by Hugh Sanders
Capt. Eversham
Characters played by Michael Ansara
Tucsos
Characters played by Nana Bryant
Mrs. Drumm
Characters played by David Clarke
Guardhouse Sentry
Characters played by John Doucette
Sergeant
Characters played by John Halloran
Wall Sentry
Characters played by Clark Howat
Lt. Underwood
Characters played by Harlan Howe
Junior Sergeant
Characters played by Claire James
Jenny
Characters played by William Newell
Corporal of the Guard
Characters played by William 'Bill' Phillips
Sgt. Medical Assistant