Kine Weekly wrote: "Rex Harrison is both convincing and interesting as the mysterious Sauvin, and Valerie Hobson is effective as the girl. John Loder handles a straight romantic lead efficiently, and good performances in support are contributed by Muriel Aked as a tourist, and Kaye Seely as the crooked armament king. ... Atmosphere of international intrigue and espionage is skilfully built up while suspenseful incident, culminating in kidnapping and blowing up of munitions dump always grips attention and offsets highly imaginative plot."
Picturegoer wrote: "Rex Harrison is more convincing than the story as a mysterious agent and Valerie Hobson is good as the daughter of a Balkan politician who gets involved with revolutionaries. John Loder is sound as a journalist; a straight romantic lead."
Picture Show wrote: "Rex Harrison gives a polished performance as the imperturbable Secret Service man, and John Loder and Valerie Hobson are excellent as the reporter and the girl. Villainy is well handled, and Muriel Aked and Meg Jenkins deserve special mention for their comedy work"
TV Guide wrote, "Competent prewar spy drama with a fairly talented cast, but it doesn't pack the action or suspense of the great espionage drama
Night Train to Munich (1940), also starring Harrison." ==External links==