Quentin Crisp, the Ultimate Guest Actor!
I just finished watching Season 2, on DVD, much of which I hadn't seen (I was in college and couldn't always catch the show). Part of the fun rewatching the show is seeing so many great actors before they were known, as well as some of the guest stars who were known. Well, lo and behold, I just saw the episode with Quentin Crisp and my jaw hit the floor. I knew he had appeared in several things (particularly Orlando, with Tilda Swinton) but I had no idea he had done The Equalaizer. His few scenes with Edward Woodward were great; looked like they were really having fun.
Fortunately, Ah keep mah feathers numbered for just such an emergency!