David Letterman calls Paramount 'gutless' for canceling Stephen Colbert's 'Late Show'

David Letterman is questioning the motivations behind the shock cancellation of his former CBS home, "The Late Show."

Speaking with former "Late Night with David Letterman" colleagues Barbara Gaines and Mary Barclay in a July 25 clip from "The Barbara Gaines Show" on Letterman's YouTube channel, the 78-year-old comedian did not hold back. He threw barbs at CBS parent company Paramount Global and David Ellison, who's slated to become CEO after Paramount merges with his Skydance Media in an $8.4 billion deal.

"It's all very strange. It's very complicated, but it was a bit of a surprise, wasn't it?" Letterman said. As the 14-minute Zoom conversation continued, he eventually called Paramount pulling the plug on Stephen Colbert's show "pure cowardice" and "gutless."

Letterman hosted the show from 1993 until 2015, at which point Colbert took over post-"Colbert Report." After Colbert announced on July 17 that "The Late Show" would be ending in May after more than 30 years, Paramount released a statement that called the move "purely a financial decision against a challenging backdrop in late night."

The media company also maintained: "It is not related in any way to the show's performance, content, or other matters happening at Paramount."