1. Male Brain vs. Female Brain

Actors Kristen Bell and Dax Shepard face off in a series of Battle of the Sexes games designed to illustrate the differences between female and male brains.

2. Ted Danson: Fact or Fiction?

Actor Ted Danson learns how human brains distinguish fact from fiction in a series of games.

3. Drew Brees: Performance

NFL football player Drew Brees puts his brain to the test with a series of mental challenges exploring how humans have hacked their brains; Keegan and Drew play a game called Draft Day, which shows how the brain must react quickly and be flexible.

5. Jack Black: Music

Actor-musician Jack Black and his Tenacious D bandmate Kyle Gass learn how music affects the brain.

6. Mark Cuban: Power and Money

Keegan-Michael Key welcomes billionaire CEO and reality star Mark Cuban ("Shark Tank") to the show.

7. Rebel Wilson: Love and Attraction

Actress Rebel Wilson joins Keegan-Michael Key to explore the power of the subconscious when it comes to falling in love.

8. Tiffany Haddish: Movie Magic

No synopsis available.