There are several good points about this episode. For one, the plot is good. Also, we have an Asian actress, young and beautiful, who has a major role. This was quite unusual, I think, in 1950's TV shows! Her character had a lot to do, and had plenty of good dialogue. It was a real pleasure to see someone out of the usual run on this episode.
I'm not familiar with other detective TV shows of the 1950's, but I suspect that many of them featured frequent shoot-outs. I know that Mannix, ten years later, for example, often had shootouts. In this series, sometimes you get those, but often you don't, and it's refreshing that the series didn't rely on them.
All of the supporting characters here are fine. Kookie is in a few scenes, being his usual bubbly self. We don't see Roscoe or Suzanne this time. It always feels more complete, more fun, when they are both in an episode. Stu has some good scenes, but this is Jeff's adventure. I noticed in the credits, Roger Smith was billed ahead of the much more experienced Efrem Zimbalist, which surprised me. Roger was only about 26 when this show began! (As was 'Suzanne').
One of the things that makes this show really stand out, is the witty banter between Jeff and Stu. That adds a nice and welcome touch of humor to the show.