Norman Gene Macdonald was a Canadian stand-up comedian, actor, and writer whose style was characterized by deadpan delivery and the use of folksy, old-fashioned turns of phrase. He appeared in many films and was a regular guest on late-night talk shows, where he became known for his chaotic, yet understated style of comedy. Many critics and fellow comedians considered him to be the ultimate talk show guest, while prominent late-night figure David Letterman regarded him as "the best" of stand-up comedians.

David Michael Letterman is an American television host, comedian, writer and producer. He hosted late-night television talk shows for 33 years, beginning with the February 1, 1982, debut of Late Night with David Letterman on NBC and ending with the May 20, 2015, broadcast of Late Show with David Letterman on CBS. In total, Letterman hosted 6,080 episodes of Late Night and Late Show, surpassing his friend and mentor Johnny Carson as the longest-serving late-night talk show host in American television history.