Incredibly predictable, but you don't watch something like this to be fooled or challenged, you watch something like this to pretend for an hour that you are as witty as the characters and to ride with them through the south of France to the inevitable conclusion. There may be better ways to spend the time, but relatively few are as fun.
Grant, Kelly and the French Riviera are surely charming and pleasing to the eye, but for me, that's as far as this movie goes. Like some of the early British Hitchcock films, there is a liberating sense of being transported to a foreign land, but this one never goes back home. There is (what appears to be) Hitchcock's homage to "Les vampires."
Hitchcock takes a vacation and decides to shoot a film along the way. Sure, it's an effortless romp, charming and affable, full of great moments and a feeling of definite immersion (as we experience the caper as a co-conspirator), but it's also Hitchcock experimenting with form; using the script as an excuse to play with colours, sounds, light and movement.
The level of detail on the new Blu-ray is just staggering. It's honestly like looking through a window into the 1950's. As for the movie itself, I found it only mildly diverting. I like my Hitchcock protagonists to be psychologically tormented ("Vertigo," anyone?) so it's not a great surprise that the film failed to capture me. "To Catch a Thief" is as light as confetti...but at least as much fun to look at too.
One of Hitchcock's trifles: even the characters seem to be having too much fun to bother moving the plot forward in any speedy or plausible way, and Hitchcock (perhaps wisely) trusts that you'll be too busy looking at the scenery and listening to the flirting to care. But Hitchcock made many trifles, and not all are as fun. Sadly, points are deducted for the scene where Cary Grant casually slaps a woman. 3 stars.