Morecambe & Wise were the most popular comedy duo in England for some time. Peter Cushing, star of many a Hammer film, including The Hound of the Baskervilles as Sherlock Holmes, and of course Grand Moff Tarkin from Star Wars.
In July 1969, Peter Cushing guest-starred on the show, in a sketch about King Arthur. Every year for the next 10 or so years, he would show up periodically on the show, asking for his money.
His first appearance, July 1969:
More reapperances, trying to get paid:
2nd appearance in the year, Sept 1969:
1970 Christmas Special
1978 - moved from BBC to different Network
1978 Christmas special
He appears very briefly at the end of the Jekyll and Hyde sketch:
1980 Christmas special: