Thomasina is the pet cat of Mary McDhui, the daughter of Scottish veterinarian Andrew McDhui. When Thomasina falls ill, McDhui declares that the pet should be put down. But when Mary and her father try to bury the cat, Lori MacGregor (Susan Hampshire), who is said to be a witch, shows up and attempts to steal it.
| Sound | Paul J. Smith | Original Music Composer |
| Writing | Robert Westerby | Screenplay |
| Directing | Don Chaffey | Director |
| Costume & Make-Up | Margaret Furse | Costume Design |
| Art | Michael Stringer | Art Direction |
| Production | Hugh Attwooll | Producer |
| Camera | Paul Beeson | Director of Photography |
| Production | Walt Disney | Producer |
| Editing | Gordon Stone | Editor |
| Writing | Paul Gallico | Novel |
| Camera | Alan Hall | Camera Operator |
