The Mists of Avalon is a 2001 miniseries based on the novel of the same name by Marion Zimmer Bradley. It was produced by American cable channel TNT and directed by Uli Edel.
Not streaming on a subscription service in the US right now.
Starring Joan Allen, Julianna Margulies, Anjelica Huston, Samantha Mathis, Caroline Goodall, Klára Issová, Edward Atterton, Michael Vartan, Michael Byrne, Hans Matheson