This episode is the follow-up to "Goodbye, Johnny," and the title pretty much removes any suspense about whether he was going to come back to the station. It's most famous for the "foot powder" sequence and the "Red Wigglers" jingle. It also has three guest stars, all fairly well-known for one reason or another: Jeff Altman (the evil record promoter) was a comedian who went on to the great distinction of co-hosting "Pink Lady and Jeff"; Philip Charles MacKenzie (the nice, secretly corrupt coke-snorting new DJ) was a familiar TV guest star who later became a successful sitcom director. Most importantly, it was the first of four different WKRP roles for Sam Anderson.
Act 2 begins with a musical sequence that as far as I know hasn't been in any of the syndicated versions: Johnny listens in a stupified, barely-conscious state to Linda Ronstadt's cover of "Ooo Baby Baby" (which had just become a top 10 hit).
Bonus trivia: In the final scene, Bailey is wearing a Thomas Schippers commemorative shirt. Schippers was the music director of the Cincinnati Symphony Orchestra, who had suddenly died a year before this episode was made. I think it may be the first genuine Cincinnati reference on the show.
Music (besides "Nowhere Band," which was written for the show by Hugh Wilson and Tom Wells) includes the aforementioned "Ooo Baby Baby"; "Into the Mystic" by Van Morrison; "Layla" by Derek and the Dominoes.
Cold Open and Act 1
Act 2 and Tag