Within minutes, one could be forgiven for thinking that the elusive monkey of the title is the director, making a Hitchcock style cameo appearance and for questioning Hollywood stalwart Richard Conte's integrity for signing up to this clunker. Throw in a low budget, lo-fi, occasionally laughable score, which sounds like it was performed by the same outfit responsible for Ed Wood's 'Jailbait' and it quickly appears that this bargain basement yarn about the bumping off of eminent scientists is headed straight for the buffers. A total train wreck of a movie!
When the brainbox behind guided missiles has a stop over in London en route to the U. S. A., despite embarrassing lapses in security and a dismissal of the monkey's existence, the authorities remain calm and bullishly stiff upper lipped. Most people would have gone ape! Visiting State Department agent Conte is given assurances regarding safety, but soon our hero has a harsh reality check. Exasperated by inert British police, hampered and harangued, by probing, all mouth and trousers reporter, Colin Gordon, kidnapped and beaten to a pulp by Russian agents, he still finds time for several stiff drinks and a spot of romance with Rona Anderson, clearly not put off by his extensive bruising and black eye.
Continued viewing spurs a combination of mirth and macabre fascination, until......wait a minute, the momentum picks up, tension mounts and against all expectations a passably noirish thriller emerges, leading to a finale in which the monkey and a midget martian contrive to (almost) steal the show, endorsing the adage; 'Never work with animals or children'.