Letterman Comedy writing and performing In 1980, Subitzky was hired as a comedy writer on The David Letterman Show (the morning show), where he helped create "The Imposter," a series of comedy sketches about a person who pretends to be celebrities in order to get on television. During the sketches, Letterman always completely accepts the fake identity that the Imposter has presented. Subitzky was soon asked to actually play the character of the Imposter, which he did four times on the morning show. He also reprised the role twelve more times on Late Night with David Letterman. For the sketches, in most cases Subitzky wore his own clothes, and there was usually no attempt to make him look like the person he was purporting to be. However, when he was claiming to be James Clavell, Subitzky wore a tuxedo, and when pretending to be Don Henley, he was dressed in a leather motorcycle jacket and a black sequined teeshirt. When Subitzky was announced as being the viewer Elizabeth Callahan, he appeared in full drag and makeup, however, his real-life moustache was clearly visible. As Santa Claus, Subitzky wore a full Santa costume, beard and hair, and, as the U.S. Airforce Academy Choir, he wore a chorister's robe. At the end of the first three sketches that were made, Subitzky left the stage via the same entrance that he came in at, i.e. via the wings, however by the 4th sketch and for all the subsequent sketches, Subitzky left the stage by walking up the aisle through the audience, apologizing profusely to audience members as he went along. For the first three sketches, Subitzky had claimed to be just one celebrity, but by sketch number four he claimed to be two people simultaneously. Late in the series of sketches he claimed to be an entire choir of children. Subitzky on The David Letterman Show The following four Imposter sketches ran on episodes of the morning show, The David Letterman Show (which ran from June 23rd to October 24th 1980): July 2nd, 1980: Ed Subitzky as the singer Donna Summer July 18th, 1980: Ed Subitzky as the actor Gary Coleman July 24th, 1980: Ed Subitzky as the actress Suzanne Somers August 5th, 1980: Ed Subitzky as actor Burt Reynolds and actress Sally Field (who were a couple at the time) The morning show was cancelled in October 1980, after only 18 weeks