Dave welcomes actress Christina Applegate, comedian Tom Dreesen and The Pretty Reckless performs.

The contestants are asked to make a single cupcake; chef Cat Cora and the contestants cook at a truck stop.

The remaining chefs need to feed 100 truckers at a remote California truck stop. The losing team returns to the kitchen to face a pressure test, which consists of naming as many foods as they can from a table of farmer's market ingredients.

Andrew Hacker dismisses for-profit colleges, and Heidi Cullen warns of extreme weather

The contestants take on America's favorite pastime when they take over the concession stands at the Washington Nationals' home, Nationals Park.