History Recap / DoctorWhoS13E6TheSeedsOfDoom

* AttackOfTheFiftyFootWhatever: Plant, in this case.

* BeardOfEvil: Scorby.

* ChromosomeCasting: Apart from Sarah, Amelia is the only female character in the story.

** Turned UpToEleven by Chase later on, when he not only doesn't stick around to make sure the Doctor is mulched by his machine, he even ''sends out'' a guard who could have made sure the Doctor was actually killed. Ironically, Chase actually seems to become smarter after the Krynoid starts mind controlling him, and starts sticking around to make sure his machine finishes the job.

* BerserkButton & BewareTheNiceOnes: Folks, we're used to Four smiling a goofy smile, all teeth and curls. We have never truly seen him ''PISSED. THE FUCK. OFF''. Until now. While [[Recap/DoctorWhoS12E3TheSontaranExperiment The Sontaran Experiment]] gave us only a glimpse of it, this is the first of at least two times in Four's tenure where we see what happens when you set him off. And if you can piss off the ''Fourth'' Doctor, you're a rare breed. Or a moron. Or both.

* SpiritualSuccessor: The Antarctica segment is both a successor to ''Literature/WhoGoesThere''/''Film/TheThingFromAnotherWorld'', and serves as an eerily prescient predecessor to ''Film/TheThing1982''.

** Committed by Scorby early on, who just leaves the people at the Antarctic base to be blown up by a bomb rather than actually bothering to make sure they're dead.
** Turned UpToEleven by Chase later on, when he not only doesn't stick around to make sure the Doctor is mulched by his machine, he even ''sends out'' a guard who could have made sure the Doctor was actually killed. Ironically, Chase actually seems to become smarter after the Krynoid starts mind controlling him, and this time makes sure that a UNIT RedShirt is finished off.

* ClosestThingWeGot: The Doctor, Sarah Jane, and two scientists are stranded at an Antarctic research station with a colleague who's been infected by a deadly alien parasite, and his only chance is an emergency amputation. The scientist the Doctor tells this to is shocked because he's a ''zoologist'', but he agrees to try after Sarah Jane points out his colleague, a botanist, is even less qualified.

* CoolOldLady: Amelia is thrilled by the idea of infiltrating a maniac's mansion.

* EnergyWeapon: UNIT now has rather clunky and homemade-looking laser guns. It still does little more than annoy.

* TheExtremistWasRight: Scorby suggests bombing the Krynoid at one point but the Doctor shoots him down, saying that nothing they have to hand would create a powerful enough explosion. Cut to a few episodes later, and the RAF provides just such an explosion.
* FamilyUnfriendlyViolence: The Doctor threatens people with a gun and makes a Molotov cocktail.

** Hypocritically, he keeps calling Keeler by his name, even when he transformed into an eight foot tall plant that no longer even resembled a human.

* PragmaticVillainy: When Amelia, who Chase tried to welsh on earlier, comes around demanding her money for the painting she did, Chase not only pays what he owes but ''doubles it'' in order to get her out of his house as quickly as possible. See also RewardedAsATraitorDeserves below.

Written by Robert Banks Stewart. This serial first aired January 31-March 6, 1976.

* RecycledInSpace: ''Series/TheQuatermassExperiment'' [-IN DORSET-]! -- when it's not being ''Film/TheThingFromAnotherWorld'' or "[[Series/TheAvengers1960s The Man-Eater of Surrey Green]]".

* PlantAliens

* ItIsPronouncedTropay: Miss Ducat insist her name be pronounced Du-cah.

* [[AnimalWrongsGroup Plant Wrongs Activist]]: The first thing Chase says is how making bonsai is plant mutilation. He spends the rest of the serial not caring for human life at all, and eventually decides to help the Krynoid TakeOverTheWorld.

* SmugSnake: Chase is ''unbelievably'' punchable.

* BerserkButton & BewareTheNiceOnes: Folks, we're used to Four smiling a goofy smile, all teeth and curls. We have never truly seen him PISSED. THE FUCK. OFF. Until now. While [[Recap/DoctorWhoS12E3TheSontaranExperiment The Sontaran Experiment]] gave us only a glimpse of it, this is the first of at least two times in Four's tenure where we see what happens when you set him off. And if you can piss off the ''Fourth'' Doctor, you're a rare breed. Or a moron.

* ArtShift: Third of four Creator/TomBaker episodes which use video rather than film for location shooting; as with "[[Recap/DoctorWhoS12E1Robot Robot]]", this was to accommodate the visual effects used in Parts 5 and 6.

* AssholeVictim: Scorby ultimately ends up getting drowned by the Krynoid while trying to escape Chase Mansion. Considering Scorby was something of a [[JerkAss jerkass]] throughout the episode (even his alliance with the Doctor was more out of a selfish need to survive as opposed to a genuine [[HeelFaceTurn Heel-Face Turn]]), it's unlikely anyone felt especially sorry for him.

* OutOfCharacterMoment: The Fourth Doctor is noticeably more TuxedoAndMartini-like than he is normally, even in his episodes which were originally written with the very SpyFiction-influenced Third Doctor [[CharacterizationMarchesOn still in the writer's minds]] (like "[[Recap/DoctorWhoS12E1Robot Robot]]"). For instance, he is very much an ActionHero in it, and willing to use fists at first opportunity, the same thing the Leela era (when he has a warrior as a companion) makes a very big thing out of him ''not'' doing. He also uses WigDressAccent to infiltrate a mansion, even though the Fourth Doctor had very little skill at disguises and tended to prefer [[BavarianFireDrill force of personality and charm]] (one of the things that separated him from Three, who used secret identities, and Two, who was [[MasterActor a chameleon]]). This is all because the script was adapted from a script for ''Series/TheAvengers1960s'' by an ''Avengers'' writer.

* TalkingToPlants: Well he plays his OminousPipeOrgan for them. When Chase does start talking to his planets it's because he's gone crazy (though in fairness it turns out the Krynoid can talk back).

* FamilyUnfriendlyViolence: The Doctor snaps Scorby's neck, threatens people with a gun and makes a Molotov cocktail.

* HoistByHisOwnPetard:
** A {{Cliffhanger}} has Sarah Jane being served up to a pod, but one of the goons holding her gets infected instead.
** Chase falls victim to the [[ConveyorBeltODoom compost machine]], which he'd used earlier as a murder weapon.

* OutOfCharacterMoment: The Fourth Doctor is noticeably more TuxedoAndMartini-like than he is normally, even in his episodes which were originally written with the very SpyFiction-influenced Third Doctor [[CharacterizationMarchesOn still in the writer's minds]] (like "[[Recap/DoctorWhoS12E1Robot Robot]]"). For instance, he is very much an ActionHero in it, and willing to use fists at first opportunity, the same thing the Leela era (when he has a warrior as a companion) makes a very big thing out of him ''not'' doing. He also uses WigDressAccent to infiltrate a mansion, even though the Fourth Doctor had very little skill at disguises and tended to prefer force of personality and charm (one of the things that separated him from Three, who used secret identities, and Two, who was [[MasterActor a chameleon]]). This is all because the script was adapted from a script for ''Series/TheAvengers1960s'' by an ''Avengers'' writer.

* FrickinLaserBeams: UNIT now has rather clunky and homemade-looking laser guns. It still does little more than annoy.

->'''Harrison Chase''': "What do you do for an encore, Doctor?"
->'''The Doctor''': "I win."

* RecycledInSpace: ''Series/TheQuatermassExperiment'' [-IN DORSET-]! -- when it's not being ''Film/TheThingFromAnotherWorld'' or "[[Series/TheAvengers The Man-Eater of Surrey Green]]".

* OutOfCharacterMoment: The Fourth Doctor is noticeably more TuxedoAndMartini-like than he is normally, even in his episodes which were originally written with the very SpyFiction-influenced Third Doctor [[CharacterizationMarchesOn still in the writer's minds]] (like "[[Recap/DoctorWhoS12E1Robot Robot]]"). For instance, he is very much an ActionHero in it, and willing to use fists at first opportunity, the same thing the Leela era (when he has a warrior as a companion) makes a very big thing out of him ''not'' doing. He also uses WigDressAccent to infiltrate a mansion, even though the Fourth Doctor had very little skill at disguises and tended to prefer force of personality and charm (one of the things that separated him from Three, who used secret identities, and Two, who was [[MasterActor a chameleon]]). This is all because the script was adapted from a script for ''Series/TheAvengers'' by an ''Avengers'' writer.

The one where the Doctor jumps a man.

* HoistByHisOwnPetard: Chase falls victim to the [[ConveyorBeltODoom compost machine]], which he'd used earlier as a murder weapon.

* [[AnimalWrongsGroup Plant Wrongs Activist]]: The first thing Chase says is how making bonsai is plant mutilation. He spends the rest of the serial not caring for human life at all.

* OpenHeartDentistry: When one of the staff of the Antarctic research station needs an alien-Virus-infected limb amputated, a zoologist is tasked to perform the emergency surgery because he's a better choice than the geologist or botanist: at least he's held a scalpel before, if only for dissections.