 | Charles Bronson als John Deakin |
 | Ben Johnson als Deputy U.S. Marshal Nathan Pearce |
 | Richard Crenna als Gov. Richard Fairchild |
 | Jill Ireland als Marica Scoville |
 | Charles Durning als Frank O'Brien |
 | Ed Lauter als Major Claremont |
 | Bill McKinney als Reverend Peabody |
 | David Huddleston als Dr. Molyneux |
 | Rayford Barnes als Sgt. Bellew |
 | Scott Newman als Rafferty |
 | Roy Jenson als Chris Banion |
 | Robert Tessier als Levi Calhoun |
 | Joe Kapp als Henry |
 | Archie Moore als Carlos |
 | Sally Kirkland als Jane-Marie |
 | Sally Kemp als Prostitute |
 | Eddie Little Sky als White Hand |
 | Keith McConnell als Gabriel |
 | John Mitchum als Red Beard |
| Read Morgan als Capt. Oakland |
 | Robert Rothwell als Lt. Newell |
 | Casey Tibbs als Jackson |
| Doug Atkins als Jebbo |
| Eldon Burke als Ferguson (uncredited) |
 | Paul Frees als Levi Calhoun (voice) (uncredited) |
| Irv Faling als Col. Scoville (uncredited) |
| William Klein als Seamon Devlin (uncredited) |
| Ron Ponozzo als Soldier (uncredited) |
| Jerry Goldsmith | Original Music Composer |
| Byron 'Buzz' Brandt | Editor |
| Tom Gries | Director |
| Jerry Gershwin | Producer |
| Tambi Larsen | Art Direction |
| Alistair MacLean | Screenplay |
| Darrell Silvera | Set Decoration |
| Alistair MacLean | Novel |
| Lucien Ballard | Director of Photography |
| Elliott Kastner | Executive Producer |
| Louis DiGiaimo | Casting |
| Michael Preece | Script Supervisor |
| Randy Glass | Gaffer |
| Gerald Endler | Special Effects |
| Kenny Bell | Still Photographer |
| Phil Rhodes | Key Makeup Artist |
| Vivienne Walker | Key Hair Stylist |
| Alma Johnson | Hairstylist |
| Evelyn Preece | Hairstylist |
| Don Guest | Production Manager |
| Nigel A. Boucher | Assistant Set Decoration |
| R. Gilbert Clayton | Set Designer |
| Sam Gordon | Property Master |
| Kim Swados | Assistant Art Director |
| Gene S. Cantamessa | Sound Mixer |
| David M. Horton | Sound Effects Editor |
| Don Merritt | Boom Operator |
| A.D. Flowers | Special Effects |
| Logan Frazee | Special Effects |
| George C. Villaseñor | Assistant Editor |
| Tom Dawson | Key Costumer |
| Paula Lynn Kaatz | Costumer |
| Terry Leonard | Stunts |
| Joe Canutt | Stunts |
| Yakima Canutt | Stunt Coordinator |
| Howard Curtis | Stunts |
| Tony Brubaker | Stunts |
| Mickey Gilbert | Stunts |
| Eldon Burke | Stunts |
| Robert Tessier | Stunts |
| Alleen N. Nollmann | Producer's Assistant |
