Any TV shows you thought were British but were American or Aussie or shows you thought were Aussie but were British or British shows you thought were American?
Father Ted is the obvious “I thought it was Irish” one but if it was Irish, it would have had a stilted atmosphere, as RTE don’t really have comedy directors (ironic considering Ted director Dermot Lowney began directing shows such as the 88 Eurovision for Telly Eireann).
A lot of dubbed anime can cause problems. I thought the Cardiff-based dub of the Moomins from the 90s was North American because of Garrick Hagon and an American accent-using Susan Sheridan as main voices.
The Thorn Birds - one of those shows you actually think is Aussie until you watch it and see that only two characters have Aussie accents.
I used to be confused whether Daktari was British or American having bought a Corgi tie-in at a toy fair. Its safari setting for some reason made me think the former.
The Muppet Show was a British-produced show with an American creator and characters.
Apparently the 1987 Max Headroom series was technically a British production, but filmed in LA.
And that most American of stories, Huckleberry Finn and his Friends was a Canadian and German co-production. A lot of Canadian shows can be misidentified as US,