The story as originally written by Lewis Greifer was considered awful so that bastard/genius Robert Holmes rewrote it under the fake name “Stephen Harris,” both out of embarrassment and because Greifer was well-known to be an unforgiving drunk. Pyramids of Mars is itself well known for being drunk as it starred Tom Baker and helped aggravate the "UNIT dating controversy." It’s also often considered to be one of the top ten or so Doctor Who stories, like, ever.