Doctor Who: Season 12, Episode 5

The Ark in Space: Part One (25 Jan. 1975)

TV Episode  |  TV-PG  |   |  Adventure, Drama, Family
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Ratings: 8.3/10 from 307 users  
Reviews: 7 user | 9 critic

The Doctor's attempt to give Harry a trip in the TARDIS sees the two of them and Sarah arriving onboard a space station in the far future, with some rather deadly security mechanisms.



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Episode complete credited cast:
Ian Marter ...
Gladys Spencer ...
High Minister (voice)
Peter Tuddenham ...
Computer (voice)


The Doctor's attempt to give Harry a trip in the TARDIS sees the two of them and Sarah arriving onboard a space station in the far future, with some rather deadly security mechanisms.

Plot Summary | Add Synopsis


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Release Date:

25 January 1975 (UK)  »

Company Credits

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Technical Specs

Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


Robert Holmes wrote the script for this story in 18 days. See more »


When the Doctor and Harry first discover the room full of cryogenically frozen humans, there is a point where the two of them are talking and, from over Harry's shoulder, you can see one of the "frozen" humans opening and closing his eyes. See more »


Harry Sullivan: She's coming round. Steady, steady on, old girl, steady on.
Sarah Jane Smith: [dazed] Harry?
Harry Sullivan: Yes, I'm here, I'm here.
Sarah Jane Smith: Call me old girl again... and I'll spit in your eye.
See more »

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User Reviews

A fan favourite and rightly so
17 March 2015 | by (United Kingdom) – See all my reviews

Review of the Complete Story:

THE ARK IN SPACE is one of the most entertaining of the Tom Baker DR WHO serials, purely because the storyline is so good. The entire serial is set on a remote spaceship, which is rapidly being taken over by some sinister space parasites who've got murder in mind. To make things more interesting, the spaceship is a kind of futuristic 'ark', carrying mankind's last hope on board.

There's plenty to love about this production: strong technical values (for DR WHO), high stakes, interesting characters, effective performances from the leading cast members, and memorable creatures. The aliens are brought to life via green paint and bubble wrap, and despite this they're oddly effective - and a lot of fun, it goes without saying.

Even better, THE ARK IN SPACE gives Baker's Who plenty to do, as he investigates technical matters and later attempts to stop the annihilation of the human race. Elizabeth Sladen is on strong and funny form as Sarah Jane, and there's constant threat and excitement from the encroaching threat of the extraterrestrial menace. Everything you could want from DR WHO, really...

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