 Jack Donaghy (Alec Baldwin) decides not to search for his biological father, after it was revealed in the previous episode that the man he believed was his father was not. Liz Lemon (Tina Fey), however, convinces him to find out who his real father is, so Jack contacts Lenny Wosniak (Steve Buscemi) — a private investigator — to search for his biological father. Lenny gives him an envelope containing the names of three individuals who could be his father. Jack tells Liz about the envelope, and she suggests they Mamma Mia! this and bring the three men to New York under false pretenses, to which Jack agrees. Jack meets the men, George Park, Fred O 'Dwyer (Stuart Margolin), and Professor Milton Greene (Alan Alda). At meeting the three men, Jack comes to the realization that Milton is his father, as George Park is Korean and Fred O'Dwyer lost his genitals in a grenade explosion during World War II. He tells Milton that he is his son, after Milton admitted to sleeping with his mother, Colleen Donaghy (Elaine Stritch), around the time Jack was conceived. Milton is happy to have him as his son, and reveals to Jack that he is in need of a kidney transplant.
