How many Submarine movies did Cary Grant act in?
I can only think of two for sure, Destination Tokyo and Operation Petticoat. However, for some odd reason i feel like i have seen him in another submarine movie.
Well there is a submarine in Father Goose that helps rescue Cary and his 'crew' (Leslie Caron and the young girls with her).
But most likely your thinking of Devil and the Deep with Gary Cooper and Tallulah Bankhead and Charles Laughton. Cary has a supporting role in this 1932 film.