NO, we Brits did NOT publicly televise public hangings in the 1960s, and we certainly did NOT disembowel them!
Let that be your answer before any of you here ask such a STUPID QUESTION, as a few people have done on comments sections on the rest of the WWW.
I've never seen this show, but FUCKING HELL, that scene was outrageous for a TV spin-off of BATMAN!!!
And this show is meant to be in the same universe as The Dark Knight and Joker, among others???