Peter gets drunk, and attempts to ride a unicycle down the steps, but falls off and crushes his father, Francis, who later dies in the hospital from the accident. Just before Francis dies, he calls Peter "a fat stinking drunk". Peter is disappointed since Francis did not care about him – so he gives up drinking and does crack instead. Brian notices this, and tells Peter that crack is not a good substitute for drinking. As a result, Peter sees a hypnotherapist, who helps him discover that Francis was not his biological father. When Peter goes to his mom, Thelma Griffin, about it, she reveals that she had an affair with an Irish man named Mickey McFinnigan and that Mickey is Peter's biological father. Brian and Peter travel to a village in Ireland to find Mickey, who they discover is the town drunk. At first horrified, Peter finds out it is considered an honorable position in Ireland by the locals. Mickey refuses to believe that Peter is his son and mocks him. When Peter sees the ghosts of Yoda, Obi-Wan Kenobi, Francis and Hayden Christensen, the first three call him a "fat stinking drunk", Francis' last words to Peter, which gives him an idea. In an attempt to persuade him, Peter challenges Mickey to a drinking contest, which Peter wins. During the contest, Peter and Mickey talk about American looks and diet in a drunk language. After the contest Mickey finally believes that Peter is his son, feeling that nobody but a member of his own family could beat him in something like a drinking contest. Although Peter's excited to have formed a bond with his real father, Brian points out that while Francis may not have been Peter's real father (and obviously wasn't the nicest person ever), he did raise Peter like he was his own son, showing that deep down, Francis really did love Peter. Peter accepts this, but is still willing to have Mickey as his biological father. Peter, Mickey and the Irish crowd enter dancing and singing to "Drunken Irish Dad." During the last few seconds of the dance, Mickey states that the Irish do not tan well. After discovering Stewie opening Meg's presents, Lois realises he is going through the "mine" phase. She later discovers him going through her jewelry, and when she tells him to stop and take everything off he snaps a pearl necklace to pieces so she spanks him. He runs off in fear and tears, but quickly realises that he actually enjoyed being hit and might be "one of those people" so he goes to great lengths in order for him to get spanked again.