To go with Orton's
Doctor Who links, I found another genre connection lurking in the Diary where I'd previously failed to spot it.
On July 18th 1967 he does a photoshoot for
Queen magazine - a group of celebrity 'goodies' to be contrasted with another group of baddies. With him amongst the goodies is Lucy '
Survivors' Fleming.
She was also in the
Avengers ep
Invasion of the Earthmen. We know Orton and Halliwell were watching
The Avengers in 1966, because
Kenneth Williams mentions it. Sadly though, Invasion of the Earthmen didn't complete production till after Orton was dead.