Reviews: From a user review on IMDb by Bunuel1976: "Abetting McCrea in his struggle are understanding wife Evelyn Keyes (she had already portrayed her definitive noir role in 1951 courtesy of Joseph Losey's THE PROWLER), Polish military 'mental case' Herbert Lom (unusually a good guy despite his obvious ambivalence) and sympathetic British Intelligence man Roland Culver. Their antagonists, then, are first-rate marksman Marius Goring (from the afore-mentioned CIRCLE OF DANGER but in a less showy role), sinister chauffeur Karel Stepanek and mysterious Austrian female Patricia Laffan (equally enigmatic off-screen, since the promise she showed in the definitive 1951 version of QUO VADIS was never delivered upon!); curiously enough, her alcoholic and uncommitted (to the cause) husband here – played by Frank Lawton (from 1935's David COPPERFIELD) – basically disappears halfway through the proceedings! The exciting action takes us from McCrea's shooting grounds (doubling as a night-time airfield for the villains' purposes) through an impersonation game to a perilous train journey to a notable climax at London's world-renowned "Madame Tussaud's" wax museum. Here, Goring startlingly blows himself up to safeguard the all-important documents that a typically meek defecting scientist had brought over with him from the other side."