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.
Unfortunately the movie The Three Lives of Thomasina is not yet available on HBO Max.
| Directing | Don Chaffey | Director |
| Writing | Robert Westerby | Screenplay |
| Production | Hugh Attwooll | Producer |
| Production | Walt Disney | Producer |
| Sound | Paul J. Smith | Original Music Composer |
| Camera | Paul Beeson | Director of Photography |
| Editing | Gordon Stone | Editor |
| Art | Michael Stringer | Art Direction |
| Costume & Make-Up | Margaret Furse | Costume Design |
| Writing | Paul Gallico | Novel |
| Camera | Alan Hall | Camera Operator |
