Nitpicking
I love George Sanders but it was difficult to suspend disbelief regarding a couple of sloppy things early on.
Clement's mother didn't hear the gunshot.
Bridget and Clement were the only people who noticed the wallet on the floor.
Why did Wilson think Clement stole his wallet? Why not one of the hundreds of other people at the station? Also unlikely was that Wilson managed to follow and find Clement so quickly.
After Clement steals the check from Bridget, he leaves the hotel and is a block away and around a corner, but when Bridget's ex leaves the hotel, he immediately spots Clement across the street.
Clement was apparently shot in the back but at the doctor's office, he's holding his side. The doctor treats him without even taking off Clement's shirt, and apparently doesn't call the police. It's night-time, and the doctor is still at his office. How did Clement find the doctor in the first place?
Clement was able to cash Wilson's check the day following the theft, despite Wilson saying that he'd be contacting his bank to stop payment. That could have been done in a phone call, so Clement shouldn't have been able to cash the check.
It was altogether too convenient that the Wentworth stock rose as soon as Clement bought it. The doctor did say that they'd be talking about penicillin at a medical conference, but would the news really be out that quickly? And did 1940's stockbroker offices really have giant screens projecting economic news? Where's the ticker tape?
I figured if there were that many unlikely events after just 15-20 minutes, there could only be more, so I stopped watching.