It was on showtime back in the 80’s.

From IMDB.com

Robin of Loxley is chosen by the mystical Herne the Hunter to become his ‘son’ and champion the oppressed. Gathering a band of comrades around him he fights a guerilla campaign against their Norman dictators, particularly the Sheriff of Nottingham and his deputy, Guy de Gisburne. Later he is succeeded by Robert of Huntingdon, renegade nobleman. This retelling of the legend introduces a strong fantasy element, with black magic and the old religion.