"Welcome Back" is a popular record that was the #themeSong of the 1970s American television #sitcom #WelcomeBackKotter. Written and recorded by former #LovinSpoonful frontman #JohnSebastian, it reached No. 1 on the #Billboard #Hot100 chart for one week in May 1976 after only five weeks on the chart, and also topped the #adultContemporary chart (the show itself had become an instant ratings success upon its premiere the previous fall).
https://www.youtube.com/watch?v=OK4_fDHv-SQ