The theme music for the 1963-77 versions was composed by Sheldon Allman. The theme, along with all incidental music, was performed by an in-studio combo led by Ivan Ditmars, consisting of an electric organ, guitar, drums, and on the nighttime version, a harp. In some seasons of the nighttime show, the combo was further augmented by a horn section. The final season of the nighttime show taped in Las Vegas eliminated the in-studio band in favor of pre-recorded tracks, due to Ivan Ditmars' retirement.