“Like someone who can’t help but overindulge on too many Oreo cookies, Stephen Colbert had more material than he needed for his first episode as host of CBS’s The Late Show on Tuesday. After a taping that ran about two hours, the show was cut down to about 70 minutes for air. Though some of that extra material has been released as bonus content on the web, here’s some of what you didn’t see on Mr. Colbert’s debut broadcast.”