After watching Johnny Knoxville on "Jackass," Peter and the guys film their own shenanigans. When Brian gets hurt, the family worries that he's getting too old, so Peter brings home a new dog. Everything is great until the "new Brian" crosses the line and humps Stewie's favorite toy.

After being pregnant for seven years, Bonnie finally gives birth to a beautiful baby girl named Susie! Stewie quickly falls for the little tyke and vows to do anything to win her heart and get in her diaper. Meanwhile, Joe borrows $20,000 from a bookie to pay for Bonnie's medical bills, but then plans to steal the money from Mr. Pewterschmidt to pay his debt.