He was auditioned for the role for years even after Moore had signed on.
Yeah, I read that. I haven’t seen enough of his work, however, to figure how well he’d have done in the role. I don’t recall having seen UFO on tv (or rather, when they had it in reruns in the ‘70s, I was too young to remember it). I saw that other Gerry Anderson series, Space: 1999 with Martin Landau.