"I Am a Thief" is a film with some nice actors and lovely settings, but it ultimately turns out to be very talky and the plot amazingly contrived and unsatisfying.
The film begins in Paris and the police have been frustrated by a series of high-end jewel robberies. So, they plan on pulling out all the stops to catch the members of this gang.
In the next scene, Pierre (Ricardo Cortez) is buying some hugely expensive diamonds at an auction. Two others, Odette (Mary Astor) and Colonel Jackson (Dudley Diggs) are also very interested in the stones. Eventually, the three end up, not accidentally, on a train bound for Istanbul--during the course of which, the stones are stolen and the police question everyone....a procedure that takes up a huge chunk of the film. In the end, the members of the gang reveal themselves and someone does something a bit heroic.
This film is way too mannered and talky. Everyone acts so calm, sophisticated and civilized through much of the film--so much so that it's a bit irritating. It's also irritating that there really doesn't seem to be any way for the audience to have clues as to who the crooks really are--and the ending seems very random. All in all, the film lacked energy and just became a tad tedious after a while--a shame as the actors seemed better than the material. And, speaking of the actors, there is a bit of a coincidence in the casting. All three played "The Maltese Falcon"--Cortez and Diggs in the 1931 version and Astor in the more famous 1941 version.
