Look, I get it. You don’t have a lot going on right now so you’re bored. Nobody invites you anywhere and you’re too shy to talk to women. You compensate for your lack of social life by making fun of others, even if that means joining a conversation about the Batman cartoon and acting like everyone else is childish for liking Batman cartoons.

I’m being hyperbolic?
You’re the one that compared it to Citizen Kane.

Heart of Ice is one of the most famous episodes. It turned Mr. Freeze from a campy 60s villain to a tragic figure. Most people don’t even know that Mr. Freeze’s sad origin story came from this episode.

Citizen Kane? Calm down dude that’s just a movie. You make it sound like it’s Macbeth or something.

After learning his daughter was Batgirl he does some detective work. Apparently on Barbara’s computer was evidence of Batman’s identity.

Over the Edge is my favorite episode.
Short synopsis: Batgirl fucking DIES and the inevitable fallout ruins Batman’s life. Commissioner Gordon learns his daughter is Batgirl and it ruins his friendship/partnership with Batman. (As it should, because it’s a total dick move to keep that from someone you supposedly trust) And using his daughter’s computer Gordon learns that Bruce Wayne is Batman and the entire police force raids Wayne manor to arrest him. It’s a great fucking episode.