The Doctor and Jo encounter an ancient race of amphibious creatures off the South Coast of England, and soon learn of their plans to seize Earth for themselves – in collaboration with the Master.
Story Order
- Story 62 from Doctor Who
- Story 3 of 5 from Season 9
Episodes
Saturday
26th February 1972
5:50PM
BBC 1 (24 mins)
The Doctor and Jo visit the Master who is held prisoner on an island.
Saturday
4th March 1972
5:50PM
BBC 1 (24 mins)
The Doctor is eager to make peace between the Sea Devils and the humans.
Saturday
11th March 1972
5:50PM
BBC 1 (24 mins)
Jo attempts to rescue the Doctor who is being held prisoner by the Master and Trenchard.
Saturday
18th March 1972
5:50PM
BBC 1 (24 mins)
The Doctor attempts to persuade Captain Hart of the danger that the Master represents.
Saturday
25th March 1972
5:45PM
BBC 1 (24 mins)
The Doctor is captured by the Sea Devils and taken to their undersea base.
Saturday
1st April 1972
5:50PM
BBC 1 (25 mins)
The Sea Devils come to the surface and attack the Naval base.
Credits
- Doctor WhoJon Pertwee
- MasterRoger Delgado
- Jo GrantKaty Manning
- Captain HartEdwin Richfield
- TrenchardClive Morton
- RobbinsRoyston Tickner
- Radio OperatorNeil Seiler
- ClarkDeclan Mulholland
- HickmanHugh Futcher
- 3rd Officer Jane BlytheJune Murphy
- Ldg. Telegraphist BowmanAlec Wallis
- Castle Guard WilsonBrian Justice
- Castle Guard BarclayTerry Walsh
- Sea DevilPat Gorman
- C.P.O. SmedleyEric Mason
- Commander RidgewayDonald Sumpter
- Lt. Commander MitchellDavid Griffin
- Ldg. Seaman LovellChristopher Wray
- Castle Guard DrewStanley McGeagh
- C.P.O. SummersColin Bell
- Lt. Commander WattsBrian Vaughan
- A/B GirtonRex Rowland
- WalkerMartin Boddey
- Rear AdmiralNorman Atkyns
- Chief Sea DevilPeter Forbes-Robertson
- C.P.O. MyersJohn Caesar