This is about as original as its title, which irresistibly recalls the Graham Greene-inspired thriller The Green Cockatoo. The budget was clearly tight, and the story of an American cop who solves a case and falls for a pretty English girl while on secondment to Scotland Yard is hardly riveting stuff. Dermot Walsh does his best with some lacklustre material, and John Le Mesurier turns up in a supporting slot, but there's little else here to recommend.

'Rocks' Owen, the well-off owner of a car-hire business, is found murdered; the last place he was seen alive was the Blue Parrot nightclub. Scotland Yard go in to investigate, with the help of a visiting American detective and a nightclub hostess who may not be all she appears to be.