Fascinating backstory on the making of this film. Reportedly Hitchcock wanted Cary Grant for the professor, the role played by Stewart, and Montgomery Clift for the role that went to Farley Granger (who was quite good). But Grant and Clift (both gay) got one look at the script and neither would go near it. In that era particularly there was enormous fear of queer-by-association, and this was particularly true for actors who were in real life homosexual and had to protect their images. I've always admired Jimmy Stewart as an actor but didn't like him in this role--it should have gone to Grant, who could have given the character a complexity and subtlety Stewart lacked. Ah, well.