 In "Monsignor Quixote" (1985), he co-starred as Sancho Zancas opposite Alec Guinness as Father Quixote.One of McKern's earliest television roles was in the 1950s black-and-white series "The Adventures of Robin Hood" (as Sir Roger DeLisle, usurper of the Locksley manor and lands, and Herbert of Doncaster, a corrupt moneylender).During the 1960s, he was one of several Number Twos in the groundbreaking and critically acclaimed TV series "The Prisoner".