I generally love the old "Studio One" episodes...or at least the ones I can find. Unfortunately, most of them don't exist any more or at least aren't available. However, one of the few that I found disappointing was "The Glass Key".
The plot of this is familiar, as it has been filmed several times before...both with George Raft in the 1930s and the most famous version with Alan Ladd only a few years before this TV episode. So, I really can't see a lot of difference between the various versions in this sense. They all concern a guy trying to prove his friend is not a criminal and his investigating the case on his own.
So why do I say to see the films instead? Well, for an episode of "Studio One" this one is VERY sloppy. In a couple scenes, folks walk onto the set at the wrong times! The worst was when the hero leaps out a window. You can SEE some guy walking by...outside the building!!! And, after the hero leaps, you see him land not many feet below, but instead he runs off the set...hoping no one would notice that he never fell anywhere!! It really was embarrassing and silly. This, combined with only okay acting (the other versions were so much better) make it one to skip.