The Monthly Film Bulletin wrote: "Conventional escape thriller, with a more than usually implausible plot. But it is quite crisply done in its own way, and if the final escape is somewhat fortuitous, the film at least emerges as more agreeable than many of its genre."
Kine Weekly wrote: "Like nearly all the films produced by Harry Alan Towers, this story has the attraction of interesting foreign backgrounds, and these lend credibility to a plot that packs only one unexpected twist and contains a number of loose ends and the premise that a journalist on duty would be such a fool as to smuggle through the Iron Curtain a package given to him by a shifty-eyed stranger with a typical hard-luck story. ... Main burden of carrying the business through rests on Paul Maxwell as Mike. He has a pleasing personality and a quietly convincing way of acting the improbable. Marisa Mell as the double-dealing Tlona rather gives the game away bv looking too beautifully trustworthy, while Terry Moore has little to do except to be bright and anxious by turns as Suzan. Albert Lieven has only a small and shadowy role as the professor." ==References==