Calling Bulldog Drummond

Calling Bulldog Drummond is a 1951 British crime film directed by Victor Saville and featuring Walter Pidgeon, Margaret Leighton, Robert Beatty, David Tomlinson, and Bernard Lee. It featured the character Bulldog Drummond created by the novelist Herman Cyril McNeile, which had seen a number of screen adaptations. A novel tiein was also released in 1951.

After three robberies are pulled off with military precision, Inspector McIver Charles Victor asks Hugh Bulldog Drummond Walter Pidgeon to give Scotland Yard a hand. As an exofficer, Drummond knows how the suspected military mastermind would think. He agrees, though he very reluctantly accepts Sergeant Helen Smith Margaret Leighton of Special Branch as his partner, believing that women are not cut out for that sort of undercover work.Drummond arranges to get caught cheating at poker at his London club so he can drop out of sight. Smith causes a minor car accident involving Arthur Gunns Robert Beatty, suspected of being in the gang. Gunns attraction to Smith and carefully planted evidence showing Joe Crandall and Lily Ross to be criminals themselves enables the pair to infiltrate the gang. ........

Source: Wikipedia