Doctor Who (1963–1989)
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Mawdryn Undead: Part Four 

Mawdryn and his fellow immortals - stuck in ceaseless cycles of mutation and deterioration - are quite determined on the Doctor sacrificing his future for their sakes, giving him the choice... See full summary »




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Episode cast overview:
Peter Walmsley ...
1st Mutant
Brian Darnley ...
2nd Mutant


Mawdryn and his fellow immortals - stuck in ceaseless cycles of mutation and deterioration - are quite determined on the Doctor sacrificing his future for their sakes, giving him the choice between helping them or stranding Teagan and Nyssa with them on their infinite journey. The Doctor, however, seeks a third option. Written by statmanjeff

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Release Date:

9 February 1983 (UK)  »

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Technical Specs

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Aspect Ratio:

1.33 : 1
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Did You Know?


This episode was watched by 7.7 million viewers on its original transmission. See more »


The Doctor: I've got to program a temporal deviation to escape the warp ellipse.
Brigadier Alistair Gordon Lethbridge Stewart: We stuck on this ship?
The Doctor: I wonder... if I reverse the polarity of the neutron flow...
See more »


Referenced in Talking About Regeneration (2009) See more »

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User Reviews

Overall not that good.

Doctor Who: Mawdryn Undead: Part Four starts as Mawdryn (David Collins) ask's the Doctor (Peter Davison) to give up his remaining regenerations as a Timelord to help him & his people die. The Doctor isn't too keen on the idea & decides to leave, once in the TARDIS the Doctor learns that both Nyssa (Sarah Sutton) & Tegan (Janet Fielding) have been infected with the alien mutation & can never leave the spaceship unless the Doctor sacrifices himself & helps Mawdryn & his people die...

Episode 12 from season 20 this Doctor Who adventure originally aired here in the UK during February 1983, directed by Peter Moffatt I can't say I have not been particularly impressed by Mawdryn Undead. The script by Peter Grimwade goes the same way as his previous story Time-Flight (1982) from season nineteen & papers over a thin plot with lots of absolutely nonsensical & incomprehensible pseudo science that tries to confuse the viewer into thinking it's clever & sophisticated but in reality doesn't make any sort of logical sense. All the technobabble the Doctor comes out with here will leave most viewers behind, I defy anyone to understand most of it. The plot is quite weak here as well, it's never explained in any reasonable way why Nyssa & Tegan are infected with the mutation but the Doctor & the Brigadier aren't, to get around this glaring error the Doctor merely says he doesn't know just like the writer, the production team & the audience so I guess we are all in the same boat. The end of this episode sees Turlough join the TARDIS crew & he isn't a particularly likable character, not much is known about him at this point other than he is an alien (who looks exactly like a human) & it's never explained just what he was doing on Earth in London attending a boy's boarding school. Overall the story has lacked any sort of threat, Mawdryn & his people just wanted to die which is all very noble but quite frankly doesn't make for an exciting or dynamic adventure. The first part of the Guardian Trilogy of stories is a less than inspiring start, hopefully things will improve with Terminus (1983) but I won't hold my breath.

There has been very few special effects in Mawdryn Undead, there's an optical effect which show's Mawdryn's spaceship blowing up & that's about it. The production values are reasonable if unspectacular, there just isn't anything overly memorable here conceptually or technically.

Mawdryn Undead: Part Four is a pretty flat & forgettable end to a generally flat & forgettable story, there's nothing else to say really. Overall I will give Mawdryn Undead a below average four stars out of ten across it's four episodes.

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