Rio Rita.

Nazi spies have infiltrated the Hotel Vista del Rio, a resort on the Mexican border. They plan to use a radio broadcast by a famous guest, Ricardo Montera, to transmit coded messages to their cohorts. Doc (Bud Abbott) and Wishy (Lou Costello) are stowaways in Montera's car, who steal a basket of "apples" that turn out to be miniature radios. They are then kidnapped by the spies, and left in a room with a bomb set to explode, but manage to escape.