Planning a holiday alone in Cornwall, Paul Marten, a fashionable doctor, is dragged out of his fishing boat to the sea bottom by Miranda, a lovely mermaid. Price for return to his home and wife is that he takes Miranda to London.
Everything [in this adaptation of Peter Blackmore’s stage play] is rightly played for laughs and Glynis Johns makes the mermaid an attractive and almost credible creature. Griffith Jones is good as her serious sponsor. Googie Withers turns in a nice performance as his bewildered wife, and David Tomlinson and John McCallum do well as the love-struck swains.