Season 3: Episode 37: Mr. Saturday Knight
Peter's boss, Mr. Weed, dies suddenly (at the Griifins' house, as it happens), and the toy factory dies with him. Being the good father that he is, Peter tries to find a job that will provide for his family. So when bathroom attending and prostitution don't work, he quickly jumps to fulfill his life long dream of becoming a Renaissance knight. After a grueling training program Peter finally realizes his dream, well, that is until the Black Knight kicks Peter out for ogling his Lady Madeline. Peter challenges the Knight in a jousting contest and regains the respect of his family.