Scotland Yard Investigator is a 1945 American crime film directed by George Blair and starring C. Aubrey Smith, Erich von Stroheim and Stephanie Bachelor.

[1] Following the outbreak of the Second World War the Mona Lisa is moved to a London gallery for safekeeping, where a German art collector attempts to steal it.

The film was a loose sequel to Republic's 1944 thriller Secrets of Scotland Yard with a number of the same cast and crew.

When Paris is liberated during World War II, the Louvre administration plans to fetch the Mona Lisa from the safety of the mountain vault in London operated by Britain's National Gallery.

Hoffmeyer's plan includes his two henchmen, Henri and Jules, who pose as the people from the Louvre arriving to collect the painting.

Hoffmeyer suspects an art dealer named Sam Todworthy of the theft of the real Mona Lisa, and pays him a visit.

Collison is tempted to buy it, to avoid the scandal that would ensue when the French and the media got word of the painting vanishing.

Toni talks to her fiancé, Inspector Bob Cartwright of Scotland Yard, who is also in charge of the investigation of Jules's murder.