History Recap / DoctorWhoS13E4TheAndroidInvasion

* ChromosomeCasting: Aside from the minor character Tessa and a few extras, Sarah is the only female character in the story.

Crayford, whose rocket had been damaged and who was rescued by the Kraals, returns to a hero's welcome. But with the Brigadier off in Geneva, no-one at UNIT believes the Doctor when he tells tall stories of android replicas -- which now include himself, Harry and RSM Benton. The Doctor manages to use the radio equipment at the base to jam the android control signal and stop Styggron releasing the virus. He then uses his own android replica to fight Styggron, who infects himself with the virus in the process and is killed.

* ChromosomeCasting: Aside from a few extras, Sarah is the only female character in the story.

** Sarah herself gets a good one in the pub, when talking to the android Adams, telling him to make sure he doesn't fall.

* ChromosomeCasting: Sarah is the only female character in the story.

* DifferentlyDressedDuplicates: Androids impersonate the Doctor and Sarah in each other's presence on two separate occasions. The Doctor realizes that the Sarah duplicate is not real because she was wearing a scarf that the real Sarah lost.

* TheGuardsMustBeCrazy: The Kraals are, put bluntly, utter ''crap'' at keeping prisoners. When they first get the Doctor, they lock him in a cell. Fair enough, but then the guards just ''walk off'', allowing Sarah Jane to walk in and let him out. Styggron sees her doing this and just ''watches'', rather than, say, alerting his androids or Crayford until after they've waltzed off. Their imprisonment of Sarah Jane's not any better - they just leave her lying on a table and go off, allowing her to walk right out of their base and save the Doctor.

* HoistByHisOwnPetard: Styggron ends up getting killed by the virus he intended to infect humanity with.
* ImpersonatingTheEvilTwin: The Doctor pretends to be his android double and successfully fools the other androids. He also succeeds in reprogramming his double to assist him, a fact which is only revealed after the double has done a Heroic Sacrifice in front of his horrified companion.

* OutOfCharacterMoment: The Doctor realizes Sarah Jane has been replaced when the android accepts the ginger pop he offers her, because he knows she hates ginger pop. In fact he figures it out the moment he sees her, because, as he put it, "The real Sarah wasn't wearing a scarf."; he's carrying the real Sarah's scarf in his coat pocket. Him giving her ginger pop is just his way of checking to make sure he's right.

Written by Creator/TerryNation. This serial first aired November 22-December 13, 1975.

* OutOfCharacterMoment: The Doctor realizes Sarah Jane has been replaced when the android accepts the ginger pop he offers her, because he knows she hates ginger pop. In fact he figures it out the moment he sees her, because, as he put it, "The real Sarah wasn't wearing a scarf." Him giving her ginger pop is just his way of checking to make sure he's right.

%%* ArmCannon: See quote at the top of the page.

%%* BondVillainStupidity: Styggron on at least two occasions.

* ArmCannon: See quote at the top of the page.

* BondVillainStupidity: Styggron on at least two occasions.

[[caption-width-right:350:Huh, [[CompletelyMissingThePoint Sarah did something with her hair...]]]]

One of only two non-Dalek scripts written by Creator/TerryNation, though a significant amount was re-written by script editor Creator/RobertHolmes, and Tom and Lis apparently changed much of their dialogue.

* WhatHappenedToTheMouse: We never see Benton again after he's knocked out by one of the duplicates. In fact, for many years some fans thought Benton had actually been killed in this story, until ''Mawdryn Undead'' revealed that he had retired from the army and become a used car salesman.
** Or Chedaki, for that matter. He doesn't go with Styggron to Earth. What happened to him?

** The Doctor's "all go together" line quoted above is a Shout Out to Music/TomLehrer's nuclear war satire "We Will All Go Together When We Go".

* WholePlotReference: The story was inspired by ''Film/InvasionOfTheBodySnatchers''.

-->'''Doctor''': Don't go. Stay, then we can [[BlackComedy all go together!]]

* BBCQuary: About five minutes after they land, the Doctor and Sarah wind up in one, where they witness android Adams leap to its death. In episode four, the landing pods end up in the version on Earth (hey, why waste a good location shoot?)

* ImperialStormtrooperMarksmanAcademy: Crayford is an ''awful'' shot. He has a line on the Doctor, who is not exactly tiny, and still manages to miss him despite shooting straight at him. The fingermen aren't exactly much better, but they've got the excuse of being robots.

* YourHeadAslpode: Styggron plans to leave the Doctor underneath the mind scanner with the controls dialled up, informing him that eventually, his head will explode.

-->'''Doctor''': "Don't go. Stay, then we can [[BlackComedy all go together!]]"

* DeathGlare: Android Doctor has a terrifying one when Android Bentor shoots him, thinking he was the Doctor.

* TwistedAnkle: Pleasingly subverted when Sarah goes down on her ankle while running away, the Doctor asks if she's alright, and she immediately is.

* TableFlip: Done by the Doctor when escaping from Crayford's office.

* LargeHam: Two Creator/TomBakers? It's amazing any scenery was ''left''.

-->'''Stygron:''' I used you, Crayford, as I used the androids. But you are no longer of any value to me!

* AllThereInTheManual: The novelisation clears up the PlotHoles, such as what happened to Chedaki.

** Creator/TerranceDicks noticed and cleared all this up when he wrote the novelisation.