Sanford (1980)

Season 1: Episode 14

Evelyn is trying to book a celebrity for her Children's Welfare charity and she remembers that Sammy Davis volunteered a year ago. On that information, Fred disguises himself as the Cello (Bass violin) player. After trying to hold Sammy to his year-old promise to perform, he mysteriously doesn't show up at the benefit. The guests start to get restless and Fred ends up dressing like Sammy Davis and pretending to be him to keep them happy. The real Sammy Davis then walks in on Fred's act, explains that his car broke down and that is why he was late, and the two sing ""Chicago, that tottlin' town"" together.