 | Stuart Whitman als Dr. McCarter Purvis |
 | Sandy Dennis als Dr. Enid Bingham |
 | Burl Ives als T.M. Trask |
 | Tom Harvey als McBride |
| Robert Goodier als Dr. Wilfrid Morton |
| Ron Hartmann als Dr. John Emmett |
 | Jack Creley als Dr. George Simmons |
| Allen Doremus als Dr. Carl Bryant |
| Kenneth James als Clinton |
| Joseph Shaw als Dr. Franz Heinemann |
| Clem Hambourg als Pianist |
| Harvey Fisher als Copter Pilot |
| Robert Warner als Guard #1 |
 | John S. Davies als Doctor |
| V.K. Saini als V.K. Saini |
| George Pyfrom als Surgeon #2 |
| Claudia Koropecki als Surgeon #3 |
 | Nina Keogh als Trask's Nurse (uncredited) |
| Robert Mann als Guard #3 |
| James Forrest als Guard #4 |
| John Trent | Director |
| Henry Denker | Writer |
| Henry Denker | Executive Producer |
| Michael Manne | Editor |
| Edgar J. Scherick | Executive Producer |
| Terence Dene | Producer |
| Dolores Claman | Music |
| Marc Champion | Cinematography |
| Ron Wisman | Editor |
| Pamella Barney | Casting |
| Jack McAdam | Art Direction |
| Roger Palmer | Costume Design |
| Ken Brooke | Makeup Artist |
| James Keeler | Hairstylist |
| Tony Lucibello | Assistant Production Manager |
| Marilyn Stonehouse | Production Manager |
| Alan Simmonds | Assistant Director |
| Brian Walker | Assistant Director |
| Wilf Culley | Property Master |
| Earle Fiset | Set Dresser |
| John Aldred | Sound Recordist |
| Ralph Brunjes | Sound Editor |
| Russel Heise | Sound Mixer |
| Ron Wisman | Sound Editor |
| Mogens Gander | Cinematography |
| Ron Gillham | Key Grip |
| Chris Holmes | Gaffer |
| László Szilvássy | Still Photographer |
| Françoise Franque | Negative Cutter |
| Honor Griffith | Assistant Editor |
| Roy Smith | Orchestrator |
| Ruby Renaut | Continuity |
