Recap: Doctor Who S1 E5 "The Keys of Marinus"
"I don't believe that man was made to be controlled by machines. Machines can make laws but they cannot preserve justice. Only human beings can do that."Back with science-based action this time, as the TARDIS arrives on Marinus, on an island of glass in a sea of acid. It turns out this island is the location of the "Conscience of Marinus", a mind-controlling machine that has been used for centuries to keep the peace. However, the villainous Yartek and his Voord warriors wanted to capture the machine and use it for evil, so the four eponymous Keys of Marinus without which the machine wouldn't function were scattered over the planet in secret locations.Now Arbitan, the "Keeper of the Conscience" has rigged the machine so the Voords can't use it and the Doctor and companions must go and retrieve the Keys of Marinus so it can be switched back on again.The Doctor and his companions are forced to play along. They team up with Arbitan's daughter Sabetha and her fabulously dressed boyfriend Altos. After adventures in a series of inventive locations (including a building under attack by ambulatory plants and a city in which Ian is accused of murder and finds that he's guilty until proven innocent), the travellers return with the Keys, only to find that Yartek has killed Arbitan. Yartek forces them to hand over the keys, but Ian passes him a fake one and the machine blows up in his face, killing him and the other Voords.Watch it here.
— The Doctor
- Adventure Towns
- Bound and Gagged: Susan in Episode 6.
- Brain in a Jar: The Morpho of Morphoton.
- Brainwashing for the Greater Good: The Conscience. Interestingly, not treated as an inherently bad idea. We get the Doctor's quote at the end, but it had harmlessly kept the peace for ages, and the one human-run justice system we see is a Kangaroo Court where you are guilty until proven innocent. There's just this pesky problem of bad guys trying to hijack the thing.
- Chekhov's Gun: The fake Key.
- Crapsaccharine World: Morphoton.
- Department of Redundancy Department:The Doctor: No. Impossible at this temperature. Besides, it's too warm.
- Also:Barbara: I believe you are under some deep form of deep hypnosis.
- Descending Ceiling: Barbara is nearly done in by a spiked one.
- Fakin' MacGuffin
- Faux Affably Evil: The Brains of Morphoton, Vasor.
- Gadget Watches: The teleport bracelets.
- Gotta Catch Them All: The quest for the keys.
- He Knows Too Much: Ayden.
- Also why the Brains of Morphoton decide Barbara must die.
- I Have You Now, My Pretty: Vasor's intentions towards Barbara are never explicitly stated, but they're not exactly difficult to guess.
- I Never Said It Was Poison: How one of the conspirators in episodes 5 and 6 slips up.
- Kangaroo Court: Ian's trial for murder. Under the laws of the alien city where the trial takes place, Ian is guilty until proved innocent; he is even described as "the accused and convicted" before the Doctor has even begun to defend him.
- Let's Split Up, Gang: Constantly. The gang splits up to search in more places in the same time, and those groups occasionally split to cover more ground. Damsel in Distress-ness ensues.
- This also allowed William Hartnell to go on holiday during the filming of episodes 3 & 4.
- Lotus-Eater Machine: Morphoton.
- Mr. Fanservice: Altos, with his clothing covering abut as much of his legs as a pair of briefs would.
- Multicultural Alien Planet
- Nice Hat: The judges◊ from the fifth episode.
- Shifting the Burden of Proof: Jurisprudence in Millennius requires the defense to prove a negative.
- Single-Biome Planet: Defied. Each episode takes place in a different environment within Marinus.
- Trouble Magnet Gambit: Vasor is the former Trope Namer.
- The X of Y
- Most of the individual episodes count as well, with the 1st, 4th, 5th and 6th being called The Sea of Death, The Snows of Terror, Sentence of Death and The Keys of Marinus respectively.