Forget Garfield: Thomasina is the tabby of a family, especially their daughter ("Jane Banks"; "her brother Michael" also co-stars). Thomasina apparently dies after an injury, but the magic of nine lives allows her to regenerate like Doctor Who.
Amazon.com: The Three Lives of Thomasina: Patrick McGoohan, Susan Hampshire, Karen Dotrice, Matthew Garber, Elspeth March, Jean Anderson, Laurence Naismith, Wilfrid Brambell, Finlay Currie, Vincent Winter, Denis Gilmore, Charles Carson, Ewan Roberts, Oliver Johnston, Francis De Wolff, Don Chaffey, Screenplay By Robert Westerby, Based On The Book "Thomasina" By Paul Gallico: Movies & TV
The director of Mary Poppins didn’t inform Karen Dotrice (Jane) or Matthew Garber (Michael) about some “surprises” that were going to show up in the movie. Karen’s dumbfounded look when Mary Poppins takes out item after item from the carpet bag and her little scream when Mary Poppins gave them medicines of different colors were genuine. They also didn’t tell them that Dick Van Dyke was playing Mr. Dawes Sr., and the two children were worried that the horrible old man was going to fall down.