- Alan Smithee: Mervyn Haisman and Henry Lincoln were so unhappy with the rewrites by Derrick Sherwin that they took their names off the story and used the pseudonym "Norman Ashby".
- Creator Backlash: Original writers Mervyn Haisman and Henry Lincoln disliked the end result enough to take their names off the transmitted episodes, and never wrote another broadcast story again (they were in talks to write a third Yeti story, but negotiations broke down). Patrick Troughton himself didn't care for the story, either, even agreeing with a fan who found it dull. He reportedly warmed to it in his later years, to the point where he even requested that it be shown at the convention where he ultimately suffered a fatal heart attack.
- Cross-Dressing Voices: Robot child example the Quarks are Cute Machines portrayed by little boys. They were voiced by an adult woman doing a childlike voice with something of a public schoolboy sound.
- Missing Episode:
- Was slated to be six episodes, but reduced to five because of major budget SNAFUs on the serial.note The resulting scramble to fill the slot gave us one of the best Doctor Who episodes ever.
- When the BBC stopped junking episodes in 1978, part three was this. However, it was very quickly returned from the British Film Institute.
- Working Title: The Beautiful People.
- You Look Familiar: Brian Cant (Chairman Tensa) had previously played Kert Gantry.
Trivia / Doctor Who S6 E1 "The Dominators"