Ho-hum piece about unearthing the secret organisation and catching the killer. All the more disappointing in that it was penned by Francis Durbridge, who wrote some pretty nifty mysteries. He also wrote some seemingly in his sleep, and this is distinctly one of the soporific ones.
Essential to the enjoyment of these films is a suspension of disbelief. So when a surgeon, after just a few minutes acquaintance with a beautiful woman, is prepared to lie through his teeth to the police investigating a murder, you know you're not in for a classic.
Ferdy Mayne is good as a hit-and-run victim in hospital, of whom there is more to than meets the eye. Roger Delgado is as devilish as ever. The rest of the cast, Robert Beatty, Elizabeth Sellars, etc, turn up and speak their lines.