In December 1986, a new planet appears in the Solar System which turns out to be a long-lost twin of Earth's named Mondas. Its inhabitants are the Cybermen.
Did You Know?
met his future wife, production assistant Edwina Verner, on this story. She threw some of the polystyrene 'snow' into his face as a practical joke, inadvertently aggravating an injury he had recently sustained to his nose. See more
The Doctor removes his glasses while talking to the Sergeant. In the next shot, which continues directly, he is wearing them again. See more
Our brains are just like yours except that certain weaknesses have been removed.
Weaknesses? What weaknesses?
You call them emotions, do you not?
But... that's terrible! You... you mean you wouldn't care about someone in pain?
There would be no need. We do not feel pain.
But *we* do.
Writer Kit Pedler's name is misspelled in the opening titles to several of this story's episodes. See more
The BBC Video release of this story features a "reconstructed" version of the missing fourth episode made by combining a fan-recorded audio track with surviving clips, screen photographs called "telesnaps", and production stills. See more
Featured in Cybermen
Composed by Roger Roger
(uncredited) See more