Okay, you are all probably gonna hate me for this description...

There was one episode where it was really funny. None of them are usually funny, but all the characters were cracking jokes about each other, but I couldn't watch the episode, so I don't know what it was about. All I remember that was unique about it was that it was uncharacteristically funny throughout the whole beginning. Like Fin and Cragen were making gay jokes or something about Munch...

I know this is a really really hard question, but can anyone think of what episode I'm talking about?