TEXT: 5:30pm - 5:55pm [SCENE_BREAK] 1: EXT. ISLAND (A small rocky island sits on a vast ocean, ringed by a beach. Almost featureless, its most distinguishing feature is a tall pyramid that stands in the centre of the island. The TARDIS silently materialises on the beach.) [SCENE_BREAK] 2: INT. TARDIS CONSOLE ROOM (The crew are gathered around the console. Although SUSAN and BARBARA have changed their clothes, IAN still wears the Chinese costume that he acquired during their previous adventure.) IAN: Any radiation, Doctor? DOCTOR: No, nothing to speak of. The counter's hardly reading anything. Shall we take a look? BARBARA: Pity you don't have a colour television. DOCTOR: Oh, but I have. BARBARA: Where is it then? DOCTOR: At the moment it's, er, temporarily hord-a-comba... (His companions laugh. The DOCTOR switches on the scanner.) BARBARA: Oh look, that's the sea, isn't it? (The scanner shows a view of the beach and the still sea.) SUSAN: Yes and sand! Grandfather, I wonder where we are? IAN: Well, one things for sure - we're not at Southend! (They laugh.) SUSAN: Grandfather, can we go and have a look? Can we? DOCTOR: Yes, yes, I don't think... I don't see why not. There's nothing... no danger about. SUSAN: Good. DOCTOR: Come on, lets go and have a look. (SUSAN opens the doors. All except IAN turn to leave.) IAN: (Unsure.) No. DOCTOR: (Turning back.) What? IAN: Well, I thought when you switched the scanner on... I thought I saw something move up there... Oh, probably just a shadow. DOCTOR: Well let's go outside and have a look. (They exit the TAR
SUMMARY:
The TARDIS arrives on the planet Marinus on an island of glass surrounded by a sea of acid. The travellers are forced by the elderly Arbitan to retrieve four of the five operating keys to a machine called the Conscience of Marinus, of which he is the keeper. These have been hidden in different locations around the planet to prevent them falling into the hands of the evil Yartek and his Voord warriors, who plan to seize the machine and use its originally benevolent mind-influencing power for their own sinister purposes.