Caroline Trewella / Miranda Trewella
Glynis Johns
Caroline Trewella / Miranda Trewella

Flirtatious mermaid Miranda swaps places with a schoolteacher who has gone on holiday. All is well until she falls in love with a human.
Caroline Trewella / Miranda Trewella
Glynis Johns
Caroline Trewella / Miranda Trewella
Jeff Saunders
Donald Sinden
Jeff Saunders
Barbara Davenport
Anne Crawford
Barbara Davenport
Nurse Carey
Margaret Rutherford
Nurse Carey
Berengaria
Dora Bryan
Berengaria
Col. Barclay Sutton
Nicholas Phipps
Col. Barclay Sutton
Ronald Baker
Peter Martyn
Ronald Baker
Percy
Noel Purcell
Percy
Mrs. Forster
Joan Hickson
Mrs. Forster
Viola
Judith Furse
Viola
Mme. Blanche
Irene Handl
Mme. Blanche
Signor Mantalini
David Hurst
Signor Mantalini
This is quite an enjoyable vehicle for a mischievous Glynis Johns, who doubles up as a gymnastics teacher ("Caroline") who is left a remote house on the Cornish coast, and a mermaid ("Miranda") who lives with her equally cheeky friend "Berengaria" (Dora Bryan) in a cave underneath. The two characters have a common ancestor and look identical, so when "Caroline" heads off on a cycling trip, her mermaid cousin takes her place - and immediately starts to charm just about every man in the village. Many of us who recall later performances from (Sir) Donald Sinden may forget just how handsome he was as he falls for her; as does "Col. Barclay Sutton" (Nicholas Phipps) whose fiancée "Barbara" (Anne Crawford) tires of the endless flirtations and sets about trying to put a spoke in her wheel. Margaret Rutherford is her usual, ebullient, self as the enthusiastically game nurse who is in on the whole thing from the start. It's amusingly suggestive at times, and the dialogue quite witty but the film is way too long, and once the joke has worn off it drags a bit. It is better, I felt, than the rather more rigid, staid original from 1948 however, and well worth a gander.
Read full reviewOnly When You’re a Mermaid | Mad About Men 1954 | Old Movie Fanatic
More movies you might want to watch next.