Doctor Who: Season 9, Episode 10

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

TV Episode  -   -  Adventure | Drama | Sci-Fi
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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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Title: The Sea Devils: Episode Two (04 Mar 1972)

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Episode complete credited cast:
Roger Delgado ...
Katy Manning ...
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.

Plot Summary | Add Synopsis

Plot Keywords:

master | second part | dandy





Release Date:

4 March 1972 (UK)  »

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Did You Know?


This serial was the first Doctor Who story to involve the Royal Navy in production, as opposed to the Army in previous episodes. When the RN was approached, the production crew was invited to shoot during naval exercises. It proved a mutually beneficial arrangement: the RN got excellent publicity for their participation, while the production received free access to Naval facilities, ships and equipment with a large number of military personnel as volunteers eager to appear on television. The fact that the then current series star, Jon Pertwee, was a veteran naval officer himself resulted in very pleasant encounters with the sailors eager to meet him. 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 »

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 Confidential: Lords and Masters (2009) See more »

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User Reviews

Still very enjoyable.

Doctor Who: The Sea Devils: Episode Two starts as the Doctor (Jon Pertwee) & Jo (Katy Manning) find Clark (Declan Mulholland) the sea fort maintenance man in a state of terror & panic mumbling about 'Sea Devils'. Then the Doctor is attacked by a Sea Devil but manages to fight it off, all three are then rescued by helicopter after Capatin Hart (Edwin Richfield) sends out a search. Back at the Naval base the Doctor & Captain Hart discuss the situation but Hart finds it hard to believe in the Doctor's talk about Sea Devil creatures. Meanwhile Colonel Trenchard (Clive Morton) has allowed the Master (Roger Delgado) to leave his prison cell & steal electronic equipment from the stores at HMS Seaspite, but for what purpose & what evil is the Master up to now...

Episode 10 from season 9 this Doctor Who adventure originally aired here in the UK during March 1972, directed by Michael Briant The Sea Devils has been a fun story so far. With it's helicopter rescues, people stranded on forts with monsters, mystery, intrigue, making homemade radios to call for help, sinking boats, secret plans, a huge military presence & even a sword fight The Sea Devils feels a bit like a James Bond style action adventure at times & there's absolutely nothing wrong with that. However there are certain things in Episode Two of The Sea Devils which are harder to compliment, who on Earth would allow a full set of razor sharp swords be placed outside the prison cell of a very dangerous criminal like the Master? In fact the Master is considered such a danger the British Government gave him his own prison on an isolated island yet also paradoxically give him some lethal weaponry to use at his leisure when the time arises. Then there's that isolated island prison itself, the geography just doesn't quite add up. People get from one supposedly isolated island location to another very quickly. In this episode Trenchard is seen to smuggle the Master into the Naval base by car in the back under a blanket! Even the Doctor tells Jo to go for help 'in the jeep' yet they are supposedly on an island in the sea. Just doesn't add up at all if you think about it for more than a couple of minutes. There's also a bit of dialogue referring to Doctor Who and the Silurians (1970) where the Doctor says the Silurians should have been called Eocenes to correct the error in Malcolm Hulke's own scripts that the Silurians could not have come from that time period but bizarrely they could not have come from the Eocene period either so it's a rather pointless inclusion.

I am fascinated by the converted Citreon cars these army chaps drive around in, they are seemingly ordinary Citreon's but without a roof, any doors or the back windscreen. I'm not being funny here but what if it starts to rain? A car with no roof or doors just isn't very practical especially here in the UK. What if you parked up for a bit, it rained & when you came back all the inside & seats were soaking wet? It wouldn't be very nice really would it? What would happen if you went round a corner quickly? With no doors you would like fall out wouldn't you? Not too many special effects here & no CSO so far which is unusual because the Pertwee era used it extensively. The sword fight between the Doctor & the Master is well choreographed but why does the Doctor give the Master his sword back when he won the duel? It just doesn't make much sense to me. There is a factual goof in this episode, the way the Doctor converts a transistor radio to send a signal rather than just receive is absolutely 100% impossible in reality. This episode also sees the Doctor play some golf in Trenchard's office, blindfolded!

The Sea Devils: Episode Two is another good episode in a good story, like a lot of Doctor Who if you think about the plot for more than a few minutes then it all falls apart a bit but taken as it is I liked it.

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