I liked this because Fred Gwynne is probably my favorite Mystery Theater voice actor. I figured it out about half way through, but I'm sure most everyone else did also.

I really never got why the Fred Gwynne character couldn't pass the detective test when he knew the answers and helped his friend prepare. I kind of got the impression he didn't fit in as a detective, but that really wasn't made clear. Overall, though, it was a good story. 