Overview
Mr. Moto's Last Warning is the sixth in a series of eight films starring Peter Lorre as Mr. Moto.
The film is an original story featuring the character created by John P. Marquand.
Plot
The British Navy in Port Said is making plans for naval manoeuvres with the French fleet. Plans are delayed because the British Secret Service has been warned of possible sabotage. On a ship docking in Port Said is Madame Delacour (Margaret Irving), wife of the French naval admiral. Delacour and her daughter Marie (Joan Carroll) are befriended by the charming Eric Norvel (George Sanders), the goofy Rollo Venables (Robert Coote), and someone posing as Mr. Moto (Teru Shimada). Norvel reveals his true nature when the ship docks and he lures Mr. Moto to his death. This "fake" Mr. Moto turns out to be a fellow agent of Mr. Moto (Peter Lorre) who is posing as a curio dealer Mr. Kuroki.
Norvel takes Delacour and Venables to a variety show featuring Fabian the Great (Ricardo Cortez), a ventriloquist. Fabian is the leader of the gang of saboteurs including Hakim (John Davidson), Captain Hawkins (Leyland Hodgson), Danforth (John Carradine), and Norvel. Danforth is actually a British Secret Service agent named Burke. Moto listens in on their conversation and is almost captured, but Burke helps him escape. Norvel is given the task of learning from Delacour when the French fleet is due at Port Said.
From Wikipedia (CC BY-SA 4.0).