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Peter soon discovers he no longer has to fight with Lois for the bathroom for his bowel movements, he can just go next door at Clevelands's old home! Well, that is until Dan Aykroyd and Chevy Chase (guest starring as themselves) move in next door. Peter invites them over for dinner and tries to prove to them he's funny, but when they don't agree, he goes to Joe and Quagmire, who agree that he's funny. In fact, the guys decide to start a improv group known as Room for Improv-ment. The guys try to put on a show and Peter keeps relying on his [blank] at Thanksgiving bit and they end up giving up.
Meanwhile, Stewie and Brian find it suspicious that Dan Akroyd and Chevy Chase would move in next door and to spy at their house and find themselves in the middle of a big spy base. Soon, the boys discover the famous actors are actualy undercover spies like their movie Spies Like Us. The guys are on a mission in Quahog to find the undercover Russian spy, who turns out to be Mayor West. Once West is reactivated as a spy when the guys say the secret phrase, he heads to Russia, and the spies, plus Stewie and Brian, head to Russia after them. They manage to catch Adam West, but it's too late, he's launched an old Soviet missile at the US, but the boys reprogram it and the day is saved.