* What is the name of Cary Grant's character?
* What is Grant's character's line of work?
* What tune plays in the hotel at the beginning?
* What is the name of the 'agent' the bad guys mistake Grant's character for?
* What is the real name of the head of the spy ring?
* How do the villains plan to kill the hero ?
* What is the make of the car Grant's character drives?
* What is the name of the sergeant at the police station where Grant's character is held for drunk driving?
* What happens to Grant's character upon meeting the real Townsend at the U.N. ?
* Whom does he meet on the train?
* Where does the female lead send Grant's character next?
* What happens to Grant's character when he gets there?
* What tune does Grant's character whistle after he meets the female lead again?
* Where does Grant's character meet the bad guys again?
* What Hitchcock regular plays the 'Professor'?
* Where does the climax of the film take place?
* Where is the all-important microfilm hidden?
* How is the female lead to be killed?
* Eva Marie Saint had already won an Oscar for her debut in 'On The Waterfront'. What other cast member would go on to win a future acting Oscar?
* Where does Hitch make his cameo?