"Welcome Back" was what many fans of John Sebastian exclaimed when the one-time Lovin' Spoonful lead singer topped the charts during the mid-'70s. TV producer Alan Sachs wanted a Lovin' Spoonful-like song as the theme song for the new ABC-TV sitcom Kotter, starring comedian Gabriel Kaplan and featuring a pre-stardom John Travolta and Lawrence Hilton Jacobs. The show would be produced by James Komack's production company through Warner Bros. Television. Sachs' agent Dave Bendet also represented Sebastian and arranged for a meeting between the two. The Sebastian song "Welcome Back" was so well liked that the producers changed the sitcom's name to Welcome Back Kotter, which became a huge hit. Its catchy theme song became a viewer favorite. Listeners' requests forced radio DJs to play tapes of the theme recorded off of TV. Record stores were flooded with requests for the song. Ironically, Sebastian was about to be dropped from the Warner Bros. Records roster because of low sales. The singer/songwriter was hurried into the recording studio to record the song and other tracks that would become his Welcome Back album. Co-produced by Steve Barri and Sebastian, the million-selling "Welcome Back" went to number one pop and number one adult contemporary for two weeks in the spring of 1976.