Kristen Bell and Dax Shepard go head-to-head in the Battle of the Sexes, a series of games designed to find out how men's and women's brains differ. Field correspondent Cara Santa Maria plays a game of "telephone" with a group in Los Angeles and mentalist Lior Suchard astonishingly reveals the names of Bell's and Shepard's first crushes. Challenges include solving a math puzzle before a gas balloon explodes.

Originally released by National Geographic, 2020. Streaming video file encoded with permission for digital streaming by Infobase on January 05, 2023.