Instagram David Letterman is not letting CBS off easy. The 79-year-old former late night host at the network spoke out in a new interview about the cancellation of The Late Show with Stephen Colbert. Stephen's show will wrap up on May 21. Originally, CBS said it was a "financial" decision to cancel the long-running program. David does not buy this. David told the New York Times, "He was dumped because the people selling the network to Skydance said, 'Oh no, there's not going to be any trouble with that guy. We're going to take care of the show. We're just going to throw that into the deal.