Merlin of the Crystal Cave, Season 1, Episode 6, The Raising of the Stones
written by Mary Stewart, 1916-2014; directed by Michael Darlow, 1934-; produced by Shaun Sutton, 1919-2004, Noel Gay Television Ltd; performed by George Winter, 1953-, Trevor Peacock, 1931-, Roger Alborough, 1953-, Robert Powell, 1944- and Benedick Blythe, 1952-, in Merlin of the Crystal Cave, Season 1, Episode 6 (London, England: BBC Worldwide, 1991, originally published 1970), 29 mins,
Source: www.imdb.com