"Bill & Peter's Bogus Journey" is the 13th episode of season five of "Family Guy"; originally airing on March 11, 2007. The plot follows Peter feeling depressed at the prospect of becoming old, in which former U.S. president Bill Clinton appears and takes him out in Quahog, giving him a new outlook on life. Meanwhile, Stewie and Brian attempt to be toilet trained by buying an instructional video, but Brian persists to leave his feces in the garden, thus making Lois force him to wear a diaper.