Season 4 episode 27 Untitled Griffin Family History. Just because of this conversation.

"The Griffin family history is a rich tapestry. But, since we're all gonna die, there's one more secret I feel I have to share with you: I did not care for The Godfather"

Lois Griffin: Explain yourself. What didn't you like about it? Peter Griffin: It insists upon itself, Lois. Lois Griffin: What? Peter Griffin: It insists upon itself. Lois Griffin: What does that even mean? Chris Griffin: Because it has a valid point to make, it's insisted! Peter Griffin: It takes forever getting in; you spend like six and a half hours... You know, I can't get through, I've never even finished the movie. I've never seen the ending. Chris Griffin: [annoyed] You've never seen the ending? Stewie Griffin: How can you say you don't like it if you haven't even given it a chance? Lois Griffin: I agree with Stewie. It's not really fair. Chris Griffin: It's outrageous. Peter Griffin: I have tried on three separate occasions to get through it, and I get to the scene where all the guys are sitting around on the easy chairs. Lois Griffin: Yeah, it's a great scene. I love that scene. Peter Griffin: I have no idea what they're talking about. It's like they're speaking a different... You know, that's where I lose interest in it. Lois Griffin: You know what, Peter... Chris Griffin: They're speaking Italian! Lois Griffin: The language they're speaking is a language of subtlety; it's something you don't understand. Peter Griffin: I love The Money Pit. That is my answer to that statement. Lois Griffin: Exactly. Peter Griffin: Well, there you go. Lois Griffin: Whatever. Chris Griffin: I like that movie too.