Doctor Who -Carnival of Monsters_Episode 1

 The TARDIS misses Metebelis Three and materialises on the SS Bernice, a ship that suddenly disappeared while travelling the Indian Ocean. Being repeatedly arrested as stowaways, the Third Doctor and Jo find out that ship's occupants keep repeating their actions, having no recollection of earlier encounters. The pair escape from the ship through a strange hatch plainly visible to them both but ignored by the crew and passengers. The Doctor and Jo venture through the circuitry of some sort of giant machine and arrive at marshlands.

They soon discover that they are not outside but are still inside the machine. Chased by Drashigs, huge swamp-dwelling carnivores, they escape back into the circuitry. Here, the Doctor realises that they have materialised inside the compression field of a Miniscope, a machine that keeps miniaturised groups of creatures in miniaturised versions of their natural environments. The Time Lords have banned such machines, but apparently one escaped. The Drashigs break into the circuitry and the Doctor and Jo flee back to the ship. They are separated in the confusion as the crew defend against the Drashigs.

The events inside the miniscope are intercut with events involving its owners, travelling showman Vorg and his assistant Shirna, who have just arrived at the planet of Inter Minor but are suspected of being spies and refused entrance by a tribunal. The tribunal learns that objects removed from the machine soon return to their normal size when Vorg extracts a foreign object stuck in the circuitry – actually the TARDIS – from the machine. Two of the tribunal members, Kalik and Orum, dissatisfied with the leadership of their planet, plot to let the Drashigs escape from the machine and allow them to wreak havoc, causing a crisis and the president's resignation.

The Doctor eventually finds a way to the real outside and is restored to normal size. He cooperates with a reluctant Vorg to return into the machine by linking it with the TARDIS. After he goes back into the Scope, which is now overheating due to the Drashigs' damage, the device he attached is shot by a tribunal member and ceases to function, leaving the Doctor stranded. He finds Jo, but they collapse on the floor as the heat gets to be too much for them.

Two Drashigs escape, but Vorg kills them by fixing the eradicator, sabotaged by the mutinous tribunal members, who later are killed by the Drashigs. He fixes the Doctor's device, pushing the Phase Two switch which brings the Doctor and Jo back, just in time, and also returning all of the Scope's other occupants to their rightful space-time positions.

As the penniless Vorg tries to get enough credit bars to return home by using the old three-magum-pods-and-a-yarrow-seed trick, the two travellers depart in the TARDIS.