Where can I watch Who Pays the Ferryman? in United States?

Who Pays the Ferryman? was a television series produced by the BBC in 1977. The title of the series refers to the ancient religious belief and mythology of Charon the ferryman to Hades. In ancient times it was the custom to place coins in or on the mouth of the deceased before cremation so that the deceased could pay the ferryman to go to Hades. The eight-part series was written by Michael J. Bird.