The Monthly Film Bulletin wrote: "Blake, his secretary and his assistant Tinker are attractively characterised in a modest thriller suffering less from its many improbabilities than a meandering, over-deliberate and for the most part tedious narrative."
Kine Weekly wrote: "Tin-pot 'who-dunit,' unfolded somewhere in England. ... The players work hard, but loose direction and an untidy script prevent their labours from being adequately rewarded. It never convinces and seldom thrills. ... The picture flits from one country hostelry to another, but nothing particularly exciting emerges from the interminable pub crawl. By the time it ends, the red herrings are over pickled! ... the film's a damp squib."
Picturegoer wrote: "Good, brisk fun in the schoolboy tradition, the film gets a reliable-looking Blake in Geoffrey Toone and a prettily menaced heroine in Barbara Shelley." Paul Mavis wrote in
The Espionage Filmography: "This plays more like an hour long television show than a feature release. It does have the delightful Barbara Shelley, however." ==References==