I am trying to find out the name of a movie probably from the 40's It is a WWII film about allied spies. The only thing about the movie I can remember is that the spies are trained to eat the European way (i.e., always hold the fork in your left hand). One of the scenes is at a cafe where one of the agents cuts his meat then shifts the fork to his right hand. Realizing the mistake, he quickly shifts it back, but he was already spotted. That's all I remember. Any help identifying this film is greatly appreciated. Thanks.
