Reviewers commenting that this is not Mr Freeze don't know the full history of the character. This is closer to his origin in the 1959 issue as Mr Zero. His name was changed by the 1960s live action series, and his more well known origin story as a tragic villain trying to save his wife was created for the animated series episode Heart of Ice. It was so popular with fans that he was retconned in the comics. Given how well known and popular that origin is, it's odd that they would choose the original, but it's unfair to judge the episode on that basis. Ignoring that story, this is a solid episode that focuses more on Bruce remembering why he became Batman and coming to terms with his choice. Freeze is merely a vehicle allowing the point to be made that, vigilante or not, Batman is needed. The only criticism I would offer is that they should have spent more time developing that point, and a villain like the joker might have been better suited. But they may have chosen Freeze because his freeze technology is one of the most difficult for the average police dept to combat. Though as Mr Zero he was one of the joke villains, Mr Freeze has evolved to be one of the more formidable foes. The GCPD would likely not be able to catch him without Batman.