From "The Big Bang Theory", actor Johnny Galecki; from the play "Ghost Brothers of Darkland County", musician John Mellencamp and author Stephen King; musical guests Queens of the Stone Age.

The cooks must create a healthy meal for over 300 school children.

The cooks must prepare a dish using mystery box ingredients, which include cod; two contestants are sent home.

Testing if a motorcycle can travel across water at high speeds; a parachute made from hotel room contents.

Superman gets a makeover, Laurie Garrett reviews Monsanto's wheat incident, the Chicago Sun-Times scraps photojournalism, and Jonathan Alter dissects the 2012 election.

Dr. Sanjay Gupta; an interview with and performance by country singer Gretchen Wilson.