Paul Marton is a Harley Street doctor who announces to his wife that he intends to take a fishing holiday alone. He sets off for Cornwall and indulges in a spot of fishing until one day he catches a beautiful mermaid! Meanwhile, his wife receives a telegram saying that her husband will be returning accompanied by a patient. Expecting an aging invalid, she is shocked on their arrival to see a beautiful young woman with her legs wrapped in cloth. Will anyone discover Miranda's fishy secret?
Based on the play by Peter Blackmore, MIRANDA was the first of two British comedies starring Glynis Johns as a mischievous mermaid. Rescued from a watery grave by the finny-tailed Miranda (Johns), handsome doctor Paul Marten (Griffith Jones) agrees under durress to take his lovely rescuer to London. Hiding her scaly lower extremities with a blanket, Miranda pretends to be a patient in Paul's clinic, much to the discomfort of his jealous spouse Clare (Googie Withers). Along the way, two eligible bachelors (David Tomlinson and John McCallum) fall in love with Miranda-and are they in for a surprise! The irreplaceable Margaret Rutherford is a riot as Miranda's befuddled nurse. Incidentally, David Tomlinson and Glynis Johns were reteamed in 1964 as Mr. and Mrs. Banks in MARY POPPINS.