Review: Theatre of Cruelty (Discworld "Book" 16 of 53ish)

Theatre of Cruelty - Terry Pratchett

This is a short story set in the Discworld universe, featuring some of the characters from the Watch subseries.  When I say short, I mean miniscule at about 4 pages.  It can be read for free from here:

A dead body is found, and Carrot attempts to figure out who murdered him.  The first part of this story is cute and I was enjoying it, but the ending didn’t make the slightest bit of sense to me.  It was obviously a joke about a TV show, but I didn’t know which one.  I read some reviews to figure out what I’d missed, and it turns out it was a reference to a show that I only vaguely remember hearing the name of, have never seen, and have no desire to see.  

But I’m sure it’s probably funny if you have any clue what it’s referencing.  If anybody reads the short story and is just as confused as I was, or if they have no intention of reading it and just want to laugh at my ignorance about popular (I guess?) TV shows, this is what it was about:

Punch and Judy.

(show spoiler)