Henry Wigram, a trusted employee of the Bonded Messenger Service, conspires with his wife and an accomplice, John Grolier, to steal a twenty thousand dollar payroll. What is actually going on is unclear at first - Wigram picks up the payroll at the bank and drives off. Along the highway he tosses the bag with the money to his wife who is waiting along the road. Then he meets up with the accomplice where a robbery is supposed to be staged. Instead, Grolier double-crosses Wigram and shoots him dead. Yes, it will look like a robbery, because it is! But Grolier just shot a man dead for a sack of worthless scrap paper, and in 1957 he'd be facing the death penalty. Complications ensue. Why do I say this episode is Hitchcockian? You'll have to watch and find out, as in watch to the end.
Wigram's wife seems convincing when Dan Matthews of the Highway Patrol comes to talk to her about the robbery - nobody knows about the murder yet because the body has not been found. She asks why would her husband risk a good job and the more than adequate living that his salary buys? Digging under the surface - as Matthews always does - finds that Wigram cosigned an 8000 dollar loan for a cousin who then defaulted. So half of that twenty thousand would have paid off that debt and then some. So like a film noir, we have an average guy , Wigram, thrust into extraordinary events and making the wrong choices to deal with them.
Note that at the beginning of the episode Wigram drives away from the bank in his company car labeled "Bonded Messenger Service". Maybe that is just for illustration's sake, or maybe that was something that was actually safe to do in 1957, but I imagine that today such a person would be in an unmarked car for the safety of all concerned.