<P> Bobby Sherman appeared in the last episode of the first season (Episode 25) as struggling songwriter Bobby Conway . This episode led into a short - lived spinoff series on ABC, Getting Together, starring Sherman and Wes Stern as Bobby Conway's business partner Lionel Poindexter . </P> <P> At the end of the first season, Jeremy Gelbwaks' family moved out of the Los Angeles area, and the part of Chris was recast with actor Brian Forster . According to David Cassidy, Gelbwaks "had a personality conflict with every person in the cast and the producers" and especially did not get along with Cassidy or Bonaduce . A dog named Simone was featured in the first season, but it was phased out during the second season . At the beginning of the fourth season, a four - year - old neighbor, Ricky Stevens (Ricky Segall), was featured and would sing a children's song during each episode, but the character was dropped mid-season . </P> <P> The first session for the pilot was produced by Monkees' producer Shorty Rogers, but later, led by music producer Wes Farrell, a group of hired studio musicians (informally referred to as the Wrecking Crew) actually created the Partridge Family's sound . The harmonious background vocalists were The Love Generation, aka brothers John and Tom Bahler, Jackie Ward, who had had a #14 hit on Dot Records in 1963 with "Wonderful Summer" (as "Robin Ward"), and Ron Hicklin (initially the Ron Hicklin Singers). David Cassidy was originally to lip sync with the rest of the cast, but he convinced Farrell just weeks into production that he could sing and was allowed to join the studio ensemble as the lead singer . He and his step - mother, Shirley, were the only two actors within the Partridge Family actors that were allowed to sing for recording . </P> <P> The Partridge Family theme song, produced by Rogers, was shown over opening credits . More than one song was used as the theme song . Season 1 episodes feature the song "When We're Singin"', which was replaced in subsequent seasons with "C'mon Get Happy". </P>

Who played the music for the partridge family