Cast & crew
Submarine X-1 (1968)
Directed by William A. Graham Written by Guy Elmes, Donald S. Sanford, John C. Champion, Edmund H. North
Cast
| James Caan | Bolton |
| David Sumner | Davies |
| Norman Bowler | Pennington |
| Kenneth Farrington | Boker |
| Paul Young | Quentin |
| John Kelland | Keith |
| Brian Grellis | X |
| William Dysart | Talbot |
| Carl Rigg | Norman |
| Steve Kirby | Seaman |
| Nick Tate | Seaman |
| Dennis Mayers | X |
| Keith Alexander | X |
| Paul Hansard | Steiner |
| George Pravda | Capt. Klaa |
| Rupert Davies | (uncredited) |
| Diana Beevers | (uncredited) |
| Luke Hanson | (uncredited) |
| Desmond Jordan | Doctor |
| Doug Robinson | Seaman |
| George Roubicek | (uncredited) |
| Richard Steele | (uncredited) |
Crew
| Guy Elmes | Screenplay |
| William A. Graham | Director |
| Ron Goodwin | Original Music Composer |
| Paul Beeson | Director of Photography |
| Donald S. Sanford | Screenplay |
| John C. Champion | Producer |
| John C. Champion | Story |
| Edmund H. North | Story |