Continuity mistake: Keep an eye on the letter that Cary Grant has with all of the names of the potential theft victims. 1) The way it is folded changes from 3 folds to 2 and from up to sideways. 2) The suite numbers are wrong , as seen when CG goes to Grace Kelly's, and it is different from the list.
To Catch a Thief (1955)
Plot summary
Directed by: Alfred Hitchcock
Starring: Cary Grant, Grace Kelly, John Williams, Jessie Royce Landis
John Robie, a reformed jewel thief, is suspected to have returned to his old tricks when a spate of jewel thiefts occurs along the French Riviera. Capricious, flirty Francie Stevens, an American tourist, dares to fall in love with him though she secretly suspects he is behind the thefts. After a few thwarted attempts to collar the jewel thief, named The Cat by the press, John enlists Francie's help to nail the culprit.
Celeste Harmer
More mistakes in To Catch a Thief
John Robie: Miss Stevens?
Frances Stevens: Yes, Mr. Burns?
John Robie: You know what I think?
Frances Stevens: About what?
John Robie: You.
Frances Stevens: I don't really care.
Trivia: Hitchcock's cameo occurs about 10 minutes into this film - he is seen sitting next to Cary Grant on a bus.