Doctor Who: Season 12, Episode 5

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

TV Episode  -   -  Adventure | Drama | Sci-Fi
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Ratings: 8.3/10 from 255 users  
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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.

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Release Date:

25 January 1975 (UK)  »

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Technical Specs

Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


This serial was released by the BBC on video cassette in the UK in June 1989. 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

Ark lark
20 June 2014 | by (United Kingdom) – See all my reviews

As a kid in the 70's, I never watched any of Tom Baker's Dr Who adventures. Partly it was a reaction to losing "my Doctor", Jon Pertwee, a great favourite of mine, but more likely, I'd probably outgrown the show. Now with previous episodes like this available, I decided to break my taboo and tune in for the first time on the fourth doctor, understanding that this was considered one of his best-remembered outings.

Immediately I watched, I was taken back to my childhood remembrances of the show, bad and good. In the former category, you get the rubbish special effects (I thought the use of models depicting spaceships went out with Gerry Anderson and as for the big green sock meant to portray the Wirrn monster...?!?), grating incidental music in the background, the awful Sarah Jane Smith crying "Doc-tah, Doc-tah" any chance she gets and with a ridiculous display of facial movements unfortunately shown in close up). On the positive side, there are the actually pretty good set design, a reasonably interesting and involving story and of course Tom Baker as the Doctor himself. He's the only one in the whole cast you can't see acting and he plays the whole thing with a twinkle in his eye and with consummate ease.

I will look out for other Baker-led adventures of our favourite Gallifreyan even though he'll never better Pertwee or Patrick Troughton as my favourite incarnation of the Time Lord.

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