On the Arthurian note, I once saw a French film, "Lancelot". The main characters, Lancelot, Arthur, and Guenevere are all medieval. While the peasants wear modern clothes. It does seem odd.
I don't remember the name of the film where Candace Bergen falls down a hole at Stonehenge and meets Merlin and Nimue. It tells the story of Gawain and the Loathely Lady, which is one of my favorites. But it doesn't tell it very well. Candace Bergen is out of place in the Arthurian world.