Douglas Adams (in-universe)

Douglas Adams was the writer of The Hitchhiker's Guide to the Galaxy and the script editor of Doctor Who in 1978. (WC: Tom Baker stars in John Lloyd's lost Doctor Who adventure, The Doomsday Contract) Douglas was friends with the Sixth Doctor. (AUDIO: The Wormery)

Biography
In 1978, while scripting the Radio 4 series The Hitchhiker's Guide to the Galaxy, he requested the help of John Lloyd to do some additional scripting. Shortly afterwards, when Douglas Adams became the script editor for Doctor Who, Lloyd sent in a story treatment called The Doomsday Contract to the BBC, but it was ultimately never produced, until 2021, when Big Finish adapted it. (WC: Tom Baker stars in John Lloyd's lost Doctor Who adventure, The Doomsday Contract)

Behind the scenes
This is an in-universe version of the real world Douglas Adams, who was first mentioned in The Wormery, but only by his first name.