Hey Kindertrauma,
I wonder if anyone can help me with this. Just before bedtime one night in the late 80s or early 90s I came upon a tv show about Robin Hood. Robin Hood was my hero, so yay! However something was not quite right this time. I only remember one scene (guess I turned it off in horror after that): Robin Hood is down by a river with someone. At one point he turns his back to the person, who keeps talking. And then SUDDENLY Robin Hood turns around, and he is EVIL now (fangs? crazy eyes? don't remember what gave it away). I think the story was that this wasn't Robin Hood, but some impostor. One clue: I'm pretty sure the actor playing Robin Hood had blond hair. Who can help me?
Since the closest I've seen on TV to Robin Hood is various cartoons and Autolycus on Hercules and Xena, I can't help much. I can, however, provide you with a list that may help you narrow it down:
http://www.imdb.com/character/ch0003908/
This could be from a mid-1980s ITV British TV series called "Robin of Sherwood". It was a dark and moody show with a soundtrack provided by Clannad. There were scenes involving some of Robin's enemies conjuring up The Devil. That could have had something to do with "Evil Robin". Also, Jason Connery, who was blond, had a role in this series as Robert of Huntingdon-Robin's successor.
Robin of Sherwood, episode entitled "The Time of the Wolf" in which Robin battles his evil twin.
You can watch it here: http://www.youtube.com/watch?v=l4NmrHy_krI
You guys are so good! Unfortunately only part 1 of that episode is on youtube, but I recognized the whole thing right away, eeire music and all. Must watch it again sometime. Ah well, thanks!