Sarah Vowell challenges Luke's public radio references, writer Chris Offutt examine's his father's secret profession, Sam Outlaw's sings about heading home again, and the Live Wire Lovebirds face-off in "The Cohabitation Examination."

Stephen Tobolowsky recalls getting held up at gunpoint while browsing for mangoes, MLB umpire Dale Scott talks about coming out as gay in the world of baseball, and Jewish reggae icon Matisyahu attempts to teach Luke how to beatbox.

"Diving In" with Aasif Mandvi, Wallace J. Nichols and Joseph

"The Long Haul" with Rinker Buck, Bri Pruett and Christopher Paul Stelling

"For the Record" with Cheryl Strayed, Anis Mojgani, Jenn Nelson and LOLO

"Back to Basics" with Ruth Reichl, Jackie Kashian and Van Dyke Parks

"All in the Family" with Maya Forbes, China Forbes, Dusty Ramone and Blitzen Trapper

"Going Viral" with W. Kamau Bell, Emily St. John Mandel and Soft Sleep

Comic Kristina Wong fills Luke in on the virtues of live-streaming a first date, Mark Bitterman explains what bitters can do for your holiday cocktails, comic Sean Jordan offers up the sickest burn to his dad ever, and Esmé Patterson's lilting voice warms up your winter.

Wait Wait Don't Tell Me's Tom Bodett offers up the key to a happy, sober life (not hanging out with drunk jackasses plays a role), Scott Poole waxes poetic about corn dogs, Head Writer Courtenay Hameister says farewell, and Box Set offers up stunning harmonies.