The third episode of the first season (airdate: October 18, 1976) of The Muppet Show included a sketch featuring Holmes and Watson: “Sherlock Holmes and the Case of the Disappearing Clues”.
Doesn’t look familiar? That’s possibly because the sketch was filmed specially for the UK broadcast of the show, which was two minutes longer than the US broadcast, thanks to a difference in commercial break times.
(Source: Muppet Wiki)
