“Tell Me Something I Don’t Know” is a live game show hosted by Stephen J. Dubner of “Freakonomics Radio.” He has always had a mission: to tell you the things you thought you knew but didn’t, and things you never thought you wanted to know, but do. Now, with “TMSIDK,” he has a new way of doing just that. This new show is still journalism, still factual — but disguised in the most entertaining, unexpected, and occasionally ridiculous conversation you’re likely to hear.

Audience contestants come on stage and try to wow a panel of experts with a fascinating fact, a historical wrinkle, a new line of research — anything, really, as long as it’s interesting, useful and true (or at least true-ish). The panel — an ever-changing mix of comedians, brainiacs, and other high achievers — poke and prod the contestants, and ultimately choose a winner. And there’s a real-time, human fact-checker on hand to filter out the bull.

This debut episode features Barnard College president Debora Spar, New York Public Library president Tony Marx, and comedian Andy Zaltzman; Jody Avirgan from FiveThirtyEight handles the fact-checking. You can subscribe now on iTunes. And don’t worry, Freakonomics Radio isn’t going anywhere — this is just a special bonus episode of Dubner’s new side gig.