Attempting to rescue Ian during the French Revolution, the Doctor disguises himself as a prominent Citizen, but his plan is rumbled by Robespierre’s right-hand-man, Lemaitre.
The TARDIS lands in the far future inside a spaceship orbiting the planet Sense-Sphere. The crew of the ship appear to be dead but then suddenly return to life.
The travelers land in the tomb of an Aztec High Priest but accidentally cut themselves off from the TARDIS as Barbara is proclaimed as the reincarnation of Yetaxa.
The travelers land on the planet Marinus where they meet Arbitan, keeper of the Conscience of Marinus, a device that’s eliminated evil from the minds of the planet’s inhabitants.
The TARDIS lands in Central Asia and the travellers meet the legendary Venetian explorer, Marco Polo, who confiscates the TARDIS to present it to the mighty Kublai Kahn as a gift.
The Doctor, Susan, Ian and Barbara are confused and disorientated after an explosion shakes the TARDIS and the doors open to reveal only a white void.
The TARDIS lands the Doctor, Susan, Ian and Barbara on Skaro where two opposing races have survived a neutronic war – the Daleks in their metal casings, and the beautiful Thals.
Two school teachers’ curiosity leads them to a junk yard where they meet Susan’s grandfather, the Doctor, and stumble into his time/space vehicle, the TARDIS.