In honor of Father’s Day, stories of sons and daughters finding out the one thing they've always wanted to know about their father. The answers aren't always what they’d hoped for. Visit thisamericanlife.org/lifepartners to sign up for our premium subscription.Prologue: As a kid, Aric Knuth sent cassette tapes to his dad, a merchant marine gone for months at a time. He’d leave one side blank and ask for a reply—but none ever came. Aric talks to Ira Glass about what it was like to finally ask his dad why. (7 minutes)Act One: Lennard Davis was always told to avoid his no-good Uncle Abie. After his father died, Abie claimed he was actually Lenny’s biological father via artificial insemination. At first, the story seemed possible, then doubtful. It took Lenny more than 20 years to sort out whether it was true, and he finds out the answer—definitively—as tape is rolling. (31 minutes)Act Two: Paul Tough’s father was a mild-mannered professor—until he suddenly left the family to pursue a lifelong quest: making contact with extraterrestrial life. For the first time, Paul joins him and asks the questions he’s long kept to himself about his father’s alien pursuits. (18 minutes) Transcripts are available at thisamericanlife.org This American Life privacy policy. Learn more about sponsor message choices.