 | Michael McVey als Paul Gibson |
| Pheona McLellan als Fiona Hatton-Jones |
 | Patrick Troughton als Professor Wagstaff |
 | Jeff Rawle als Sniffy Kemp |
 | Sorcha Cusack als Miss Campbell |
 | Ronnie Brody als Grandpa Hatton-Jones |
| Michael Pickwoad | Art Direction |
| T. E. B. Clarke | Writer |
| Harry Robertson | Original Music Composer |
| Harold Orton | Producer |
| Richard Leyland | Assistant Director |
| Colin Martin | Sound Mixer |
| Jan Darnley-Smith | Director |
| Tommy Fletcher | Director of Photography |
| Phyllis Townshend | Continuity |
| Aubrey Lewis | Sound Mixer |
| Rita Wakely | Wardrobe Supervisor |
| John C. Wilcox | Production Manager |
| Gordon Grimward | Editor |
| Andrew Shergold | Sound Editor |
