Doctor Who (1963–1989)
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The Tenth Planet: Episode 4 

The Cybermen take over the base again, apparently to stop the humans using the Z-Bomb, but then the Doctor realises they intend to use it themselves to destroy Earth.



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Episode cast overview, first billed only:
Michael Craze ...
David Dodimead ...
Christopher Dunham ...
R / T Technician
Callen Angelo ...
Radar Technician
Dudley Jones ...
Harry Brooks Jr. ...
Krang (as Harry Brooks)
Reg Whitehead ...
Gregg Palmer ...
Steve Plytas ...
Ellen Cullen ...
Geneva Technician
Peter Hawkins ...
Cybermen (voice)


The Cybermen take over the base again, apparently to stop the humans using the Z-Bomb, but then the Doctor realises they intend to use it themselves to destroy Earth.

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Release Date:

29 October 1966 (UK)  »

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Technical Specs


Sound Mix:

Aspect Ratio:

1.33 : 1
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Did You Know?


This episode was wiped by the BBC. It is still missing from the BBC archives and is listed as one of the top ten missing British television programs, alongside the BBC news studio commentary from the Apollo 11 mission. However, footage of the regeneration from William Hartnell to Patrick Troughton does exist due to a clip used in Blue Peter (1958). See more »


Dr. Who: [regaining consciousness] Hmm... what was that you said, my boy?
Ben: [glances in confusion at Polly, then back to the Doctor]
Dr. Who: [speaking more clearly] It's all over. That's what you said.
Dr. Who: No.
[slightly longer pause]
Dr. Who: It's far from being all over.
See more »


Featured in Second Time Around: The Troughton Years (2012) See more »

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User Reviews

Historic, very effective and entertaining - First ever Cybermen story and the first ever regeneration for the Doctor
21 August 2014 | by (South Wales, UK) – See all my reviews

Review for all 4 parts:

This story from writer Kit Pedler is historic and thankfully the quality matches its importance. And important it really is because the idea of changing the actor playing the Doctor by having him 'regenerate' into a different version of the same character was incredible and untested. It is hard now to imagine how radical this idea was at the time. If it had failed Doctor Who would have been finished whereas as the time of writing we have just celebrated an amazing 50 years of Doctor Who with the show and most of its key elements still continuing as strongly as ever.

As a springboard for all that we have this excellent adventure which also has the historic first ever appearance by the Cybermen. I really like these prototype Cybermen and even their 'sing-song' voices. I think the concept behind them is great and the story itself has them involved in an exciting attempt to destroy humanity. Their unfeeling nature and the scares and action set them up as an iconic 'monster' to rival the Daleks.

All aspects of the production are very good indeed and any flaws are minor. The story unfortunately has the Doctor sidelined a lot of the time which was unnecessary and sad in Hartnell's last regular appearance. However, when he does get involved he is as good as ever, delivering his lines with his usual charisma and that magical touch Hartnell had for being somewhat other worldly and dangerous but also endearing and delightful.

This is a classic which all fans must see. All 4 episodes 10/10.

Average rating for all William Hartnell episodes 8.5/10.

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