A young married physician discovers a mermaid, and gives into her request to be taken to see London. Comedy and romantic entanglements ensue.

Glynis Johns
as Miranda Trewella

Googie Withers
as Clare Martin

Griffith Jones
as Dr. Paul Martin

John McCallum
as Nigel

Margaret Rutherford
as Nurse Carey

David Tomlinson
as Charles

Yvonne Owen
as Betty

Sonia Holm
as Isobel

Brian Oulton
as Manell

Zena Marshall
as Secretary
Peter McGinn
This is a rather harmless old black and white comedy-fantasy. I had never heard of it before this opportunity came along to watch it, and the only name I recognized was jolly Margaret Rutherford, a familiar and very busy character actress for decades. Glynis Johns carries the film with her pretty fa...
CinemaSerf
Griffiths Jones is ("Dr. Paul Martin") who leaves his wife to go on a Cornish fishing trip where he falls foul of mischievous mermaid "Miranda" (Glynis Johns) who holds him captive in her underwater grotto. Her condition for release is that he take her to London where, abetted by Margaret Rutherford...