EXCLUSIVE: While we’re all thanking David Letterman for tossing the genteel Tonight Show mold and recasting post-primetime comedy in his own rebellious image, here is a heresy worth considering: Letterman’s debt to Ed Sullivan goes way beyond just the name of the theater in which he’s hosted Late Night since August 30, 1993. It was Sullivan, after all, who could showcase prima diva Joan Suther…
SOURCE: Deadline at 10:52AM on May 20, 2015