David Letterman is reflecting on his Late Show legacy ahead of the program’s imminent demise. The 79-year-old comedian was the original host of the late-night CBS show from 1993 to 2015 before passing the reins to Stephen Colbert . CBS pulled the plug on the popular talk show last July, citing a “financial decision.” The final episode will air May 21. In a new interview with The New York Times , Letterman was asked about his initial reaction to the news. “Disbelief,” he said. “Then it seemed like a botched holdup. When we got the facts about the Ellison family [David Ellison, with backing from his father, Larry, bought CBS’s parent company, Paramount Global], I took great delight in referring to the principal as the Ellison Twins. I was later corrected and told it’s just one guy. I didn’t care and I still refer to him as twins. There’s also the old man, Larry.…