Cast & crew
PROBE: The Zero Imperative (1994)
Directed by Bill Baggs Written by Mark Gatiss
Cast
| Caroline John | Dr. Elizabeth Shaw |
| Jon Pertwee | Dr. Jeremiah O'Kane |
| Colin Baker | Peter Russell |
| Louise Jameson | Patricia Haggard |
| Sylvester McCoy | Dr. Colin Dove |
| Mark Gatiss | Dr. William Bruffin |
| Sophie Aldred | Public Relations Officer |
| Linda Lusardi | Louise Bayliss |
| David Terence | Daniel O'Kane / Eustace O'Kane |
| Nicola Fulljames | Dr. Beatrice Hearst |
| Patricia Merrick | Dr. Julie Gilchrist |
| Jonathan Rigby | Cummings |
| Alexander Kirk | Orderly |
| Daniel Mills | Ghostly Child Voice |
| Peter Davison | Patient One |
Crew
| Bill Baggs | Director |
| Mark Ayres | Original Music Composer |
| Andy Grant | Producer |
| Mark Gatiss | Writer |
| Dick Kursa | Director of Photography |