Cy Endfield directed this small comedy-thriller quite some time before his epic film, "Zulu", but it was not released until some six months after that large-scale production. It was one of several British films released in 1964 after spending well over a year on the shelf - others included "The Leather Boys", "Ladies Who Do" and "The Comedy Man".
Hugh Griffith at one point addresses Ian Carmichael as "Caliban" - a role in which Griffith had enjoyed great personal success on stage at the Old Vic a few years earlier.
According to Ian Carmichael's autobiography, this comedy-thriller, for which he'd had high hopes, was ruined by constant script re-writes and by budget and other restrictions - eventually, he reported, the film over-ran its schedule and the actors and director were forced to finish it in two very hurried days before the money was cut off.
Final film of Barbara Cavan.
Mandy Rice-Davies's debut.