Question: What year was the play, directed by Frith Banbury and starring the man best known for his role of King Lear, released? 
Sentence (from "Michael Hordern"): He is best known for his Shakespearean roles, especially that of King Lear, which he played to much acclaim on stage in Stratford-upon-Avon in 1969 and London in 1970.
Relevant evidence: Yes