The Monthly Film Bulletin wrote: "Spy thriller with an involved, though fairly coherent, plot, hinging on the necessity to save a desperate situation within a limited period of time. With the exception of Pitt, who is convincingly played by Andre Morell, the characters are essentially subordinate to the action. Tension is sustained, and Val Guest directs with slick confidence from a laconic script."
Radio Times calls the film "a minor Cold War thriller", adding, "(Val) Guest puts a neat (if downbeat) spin on events," and concluding, "the back-up cast is as solid as a rock, with Guest's wife Yolande Donlan putting in an effective appearance".
TV Guide describes it as "slightly more interesting than the normal run of British spy films, thanks to an unusually intelligent script." ==References==