On October 1, 1993, Hicks was scheduled to appear on "Late Show with David Letterman" on CBS, where Letterman had recently moved. It was his 12th appearance on a Letterman late-night show, but his entire performance was removed from the broadcast: at that point the only occasion where a comedian's entire routine was cut after taping. Hicks's stand-up routine was removed from the show, Hicks said, because Letterman's producers believed the material, which included jokes involving religion and the anti-abortion movement, was unsuitable for broadcast. Producer Robert Morton initially blamed CBS, which denied responsibility; Morton later conceded it was his decision. Although Letterman later expressed regret at the way Hicks had been handled, Hicks did not appear on the show again. Hicks was undergoing chemotherapy at the time of his final "Late Show" appearance, unbeknownst to Letterman, and most others outside of Hicks's family, and died less than four months later.