Secrets of Talk Shows.

The Who Wants to Be a Millionaire? host, who died July 24, held the Guinness World Record for clocking more hours on camera than anyone else in the history of TV. Originally broadcast in 2011.

The Late Late Show with James Corden fills the post-David Letterman time slot on CBS. TV critic David Bianculli says that based on first impressions, Corden will "settle in nicely."

Ahead of The Colbert Report's last episode, Fresh Air listens back to interviews with Colbert. "I didn't realize quite how liberal I was until I was asked to make passionate comedic choices," he said.