Debs, I remember much the same as you, I think I have a video recording of the Riverside Studio incident (apparently he got friends to sneak in a change of clothes for him, so it was not expected by the interviewer) somewhere.
Two other major television influences for me, were :-
1. An (1970s Christmas?) advert for a portable hairdryer with hood, in which a 17th century cavalier on the run from roundheads, restyled his long hair using curlers and the hood, and got past his pursuers disguised as a woman with ornate hair, corset, floor-length dress, etc.
2. In the cartoon 'Arthur! and the Square Knights of the Round Table' an episode has Lancealot accidently being transformed into a beautiful woman.
I certainly liked the idea of trying both of these out for myself. I would dearly like to see these short items again.
Regarding Christopher Morley, I think he was in a number of U.S. programmes & films, including a hospital soap where his 'female' character had a number of weeks, before being exposed as a crossdresser.
Is there a website/resource where those of us who have such clips could share them with our fellow members?
Sandra