Trailer
 | Robert Powell as Rook |
 | Jennie Linden as Sister Mary |
 | George Maharis as Mark Fields |
 | Anthony Newlands as Tony Barton |
 | Derek Fowlds as Dicky |
 | Leigh Lawson as Larry Turner |
 | Windsor Davies as Detective Moore |
 | Norman Mitchell as Security Man |
 | Maggie Rennie as Housekeeper |
 | Joan Haythorne as Mother Superior |
| Gerry Cowan as T.V. Director |
| Jill Shakespeare as Operator |
| Directing | |
| Robert D. Cardona | Director |
Sound | |
| Laurie Johnson | Music |
Writing | |
| Brian Clemens | Writer |
Production | |
| John Sichel | Producer |
