 Many of these were TV series produced by "Four Star Television" when Gilbert was Music Director.In addition to the main theme songs, Gilbert also composed library music cues used in many TV series episodes, including episodes of "Gunsmoke", "The Big Valley", "The Adventures of Superman", "Leave It to Beaver", "Johnny Ringo", "Harrigan and Son", "McKeever and the Colonel", "Gilligan's Island" and "Perry Mason".During his library music years, he formed a publishing company named for his sons "John Paul Music" to collect ASCAP publisher royalties.