The Muppet Show was actually shot in the UK at Elstree Studios, produced by Lew Grade at ATV. It was syndicated globally, including to the US, but it was not actually an American show.
Jim Henson was American though and the Muppets were first on American television, first in local Washington DC stations and then apparently (just looked this up) the UK show had two pilot episodes on ABC in the US.
Sure. Which indeed makes it natural that Americans would assume it was an American show and might not be known overseas.
But the surprising truth is it ran first in the UK, and was filmed just outside London.
I sense that you’re reacting to this news as if I shared it with a tone of ‘what idiot doesn’t know that?’, when my intent was to share it more in a tone of ‘So, actually, fun fact…’
If you ever wondered why the heck there was a muppet show with John Cleese as the guest star… this would be why.
> I sense that you’re reacting to this news as if I shared it with a tone of ‘what idiot doesn’t know that?’
Not really. Just sharing why people may think of it as American. eg. Wikipedia describes The Muppets as: "an American ensemble cast of puppet characters".