Doctor Who: Season 9, Episode 10

The Sea Devils: Episode Two (4 Mar. 1972)

TV Episode  |  TV-PG  |   |  Adventure, Drama, Family
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Ratings: 8.0/10 from 153 users  
Reviews: 2 user | 1 critic

The Doctor and Jo are trapped on the fort by a Sea Devil while the Master convinces Trenchard to help him steal some electronic components.


(as Michael Briant)


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Episode complete credited cast:
Roger Delgado ...
Edwin Richfield ...
Clive Morton ...
June Murphy ...
Eric Mason ...
Declan Mulholland ...
Pat Gorman ...


The Doctor and Jo are trapped on the fort by a Sea Devil while the Master convinces Trenchard to help him steal some electronic components.

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Release Date:

4 March 1972 (UK)  »

Company Credits

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Technical Specs

Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


This episode was watched by 9.7 million viewers on its original transmission. See more »


The helicopter sent to rescue the Doctor and Jo from the sea fort is a Westland Sea King when it leaves base. However, the helicopter that arrives at the sea fort is a Westland Wessex. See more »


Jo Grant: Those things that attacked us. You said you'd seen something like it before.
Doctor Who: Something very similar, certainly. They emerged from some caves in Derbyshire.
Jo Grant: The Silurians, wasn't it? The Brigadier was telling me.
Doctor Who: That's a complete misnomer. The chap who discovered them must have got the period wrong. No, properly speaking, they should have been called the Eocenes.
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Crazy Credits

The BBC wish to acknowledge the help given to them by the Royal Navy in the making of this programme See more »


Featured in Doctor Who Live: The Afterparty (2013) See more »

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User Reviews

Great example of Pertwee era 'monster threatens the Earth' format.
29 September 2014 | by (South Wales, UK) – See all my reviews

Review of all 6 episodes:

The Master teams up with reptilian creatures who have been dormant under the ocean for millions of years to try to conquer humanity (again). These creatures, which are dubbed Sea Devils by terrified humans, are relatives of the 'Silurians' or as The Doctor re-names them Eocenes. They were on Earth before humans and want to claim the planet back after eons of suspended animation in the ocean depths. The Doctor tries to broker peace whilst The Master whips up a war. Human leaders also have the appetite for war so trapping The Doctor in the middle.

This adventure is not flawless but provides superb entertainment and iconic scenes throughout. The first two episodes and last two episodes of this adventure are terrific fun, exciting, interesting, well written and acted with only very minor faults. Whilst the middle two parts are slightly more flawed as the story is marginally stretched over 6 parts, they too are really good. The interest and quality levels never drop below 9/10 and this epitomises Pertwee era Who.

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