S05E10 Peter's Two Dads
Peter and Lois upset Meg when they forget that her 17th birthday is a few days away. They hastily plan a birthday party that Meg complains she won't want to be seen at. Peter gets drunk and makes a fool out of himself. Eventually, he dresses up as a hobo clown and attempts to drive a unicycle down a set of stairs, but he is unable to control the unicycle and falls over the banister, landing on top of his father Francis, one of the party guests. Francis is critically injured with multiple injuries; with the family surrounding him, he briefly awakens to tell Peter "You're a fat, stinking drunk!" Francis dies immediately thereafter. Peter is depressed over his father's death and attempts to turn to crack. Eventually, Brian refers Peter to a hypnotherapist, who gets Peter to reveal that Francis is not his biological father. Peter visits Thelma, who admits that he was conceived while she had an affair with an Irishman 40 years earlier and that he (the father) has remained in Ireland. Brian...