Basil Radford and Naunton Wayne are at it again: this round, after getting dishonorably discharged from the army for allowing a "dangerous" Nazi to escape, they open a private detective agency and get involved in the search for a stolen diamond. They have certainly come a long way since "The Lady Vanishes" (1938), the film that introduced them to the public (albeit with different identities): this time verbal humor, which is kind of their trademark, has been reduced in favor of rather basic slapstick, culminating in a multiple-vehicle chase at the end. Another notable thing is that the comic Nazi villain and his dim-witted sidekick share about the same amount of screen time as the two "official" leads. Pouty young Diana Dors makes a short walk-on appearance. ** out of 4.