This episode has a pretty interesting premise, and as usual, the plot is tight and self-contained; though it does include a very small subplot, which is quite unusual for the series in my experience.
The two standout elements for me were the mid-century modern aesthetic of the hotel where the action takes place (which I loved), and the fact that Bill Gannon finally gets to do more than stand beside Friday and nod.
Harry Morgan was, of course, a very good actor, but he rarely got an opportunity to show it on Dragnet. For one, it's just not that kind of show. The tone of the series demands a certain type of straightforward and self serious style that Jack Webb was the master of and to which Morgan was nearly his equal. But Morgan's Bill Gannon rarely got anything to actually do. Here he gets to be integral to the story and have the stage to himself a bit. It was nice to see, and helps to lift the episode up a notch.