Personally, I love to see Quagmire and Brian in the same episode. It's always funny in every way, even though there is no obvious conversational jokes. Moreover, this week's episode started with Peter. He only has 1 white shirt left and it's getting smelly, and he just freaks out when he sees that the dry cleaner lost his other white shirt. He even breaks into his house and finds a white shirt, but it's way to small, and that moment comes the guy with shotgun. Next thing we see, Brian coming to the police station to bail out Peter. The show actually starts at this point. I don't want to spoil the rest for the ones who haven't watched this episode yet.
All in all, almost a 10.