Hitchcock has a problem when he tries to make light entertainments outside the suspense genre. Working away from turf where he's the unquestioned master, his taste in scripts can go very slack, as if he expects his top-flight star cast to carry weak material. As a plot To Catch a Thief is a creaking bore, a pale retread of 1930s clunkers about gentleman jewel thieves. John Robie, a master thief sprung from prison during WW2, joined the resistance (like 99% of France, according to the movies) and earned his freedom by killing 72 Nazis. Ten years later, he's the wealthy owner of a million dollar chateau overlooking Cannes but doesn't seem to have much in the way of visible income. His ex-crook resistance buddies are all impoverished kitchen help in a restaurant, and some try to kill Robie when he's suspected in a new wave of burglaries. The concept of old patriots turning on their comrade is poorly established -- in this artificial situation, they might as well be jealous because he's turned into a movie star.
The supporting cast includes Brigitte Auber as Danielle Foussard, a young French woman who tries to seduce John Robie.
Grace Kelly and Cary Grant in the 1953 Sunbeam Alpine Mk1 convertible.