The Munchurian Candidate

When sharing their date night with the girls, Lois reveals that Peter is hesitant to perform oral sex on her. Seeking the help of a hypnotist, it seems that the experiment has failed, until she finds out that Peter tuned into the wrong key phrase and responds well when he hears the theme to Extra. But when they visit her parents' house, Peter takes a plate up to her bedridden mother. Lois realizes too late what time it is and hurries upstairs to stop Peter as the theme plays, but he has already completed the act on Babs. After a long, silent ride home, he is able to vomit violently, but when he hears the theme when Meg watches television, he starts to move towards her as Lois tries to reign him in.

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Meanwhile, as Brian sits down to write, he hears a disturbance outside and finds that Stewie is building a new treehouse. But when he invites Brian and Chris to come visit after it's complete, he overhears them trashing the place as they leave. He revamps the treehouse, which seems to meet with their approval, but again he hears them trash the place on their exit and he vows revenge. Tricking them into returning to the treehouse, he beats and binds them, and when they think they can get away, he corners them with a crossbow. As he prepares the fire, Chris compliments his craftsmanship on his home-made crossbow and Brian agrees. Suspicious at first, he eventually is won over and allows them to go free, where he hears them speak ill of him again. He pursues and wounds them with the crossbow, but when he encounters a topless Meg, he shoots himself.