David Letterman didn't hold back in calling out Paramount for acting out of "cowardice" in canceling his former CBS program, "The Late Show."

David Letterman delivered a fiery rant against CBS and parent company Paramount for cancelling Stephen Colbert’s “Late Show,” calling the decision “gutless” and “pure cowardice” as he labeled his successor a martyr of the network.

Actress Sandra Oh cursed CBS and Paramount networks over Stephen Colbert's show cancellation, citing concerns about culture and free speech during her guest appearance.