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Recap: Doctor Who S2 E1 "Planet of Giants"

"Do you know why I'm a success, Mr Farrow? Because I've never allowed the word "can't" to exist."
Forester

Given a second seasonnote , Doctor Who kicks off with a sci-fi staple the heroes are shrunk to about an inch tall.

All the usual fun and frolics with perfectly normal household objects becoming perilous deathtraps are there, but they also accidentally stumble upon a plot by ruthless businessman Forester to launch a new insecticide, DN6, despite it being harmful to other life. A civil servant named Farrow investigates, but upon refusing to back down is murdered by Forester (told you he was ruthless). Forester then summons the creator of the insecticide, Smithers, and blackmails him into helping cover up the crime.

Barbara is made ill by the insecticide, but the others manage to foil Forester's plan by tampering with his telephone, causing the local telephone exchange operator to be suspicious and send her policeman husband along to investigate. He isn't murdered, and brings Forester to justice.

The Irwin Allen series Land of the Giants bears a remarkable similarity.

Watch it here.

This story provides examples of:

  • Corrupt Corporate Executive: Farrow, though it's never stated what position, if any, he holds. He could just as easily be some sort of venture capitalist.
  • Definitely Just a Cold: Barbara tries to write-off her poisoning symptoms as some sort of minor illness.
  • Eye Scream: The Doctor manages to have an aerosol can of insecticide (labelled "Highly Flammable") explode right next to Forester, who reacts by holding his hands over his face and screaming in agony, heavily implying some metal hit him in the eye.
  • Green Aesop: Spraying chemicals everywhere, even with good intentions, can have unintended consequences.
    • Worth pointing out that this serial was made just two years after the publication of Silent Spring, which kick-started the modern environmentalist movement and led to (among other things) the banning of DDT.
  • Hand Wave: The reason behind the shrinkage of the Doctor and Co. is... Space Pressure.
    • The novelization by Terrence Dicks is a bit more detailed, explaining that it's connected to the amount of atmosphere suddenly displaced by the TARDIS' materialization, and how materializing incorrectly results in the "Space Pressure" effect.
  • He Knows Too Much: Happens to Farrow when he crosses Forester. Nearly happens to Smithers but for a can of insecticide blowing up.
  • Incredible Shrinking Man: Obviously.
  • Little Old Lady Investigates: Hilda.
  • My God, What Have I Done?: Smithers when he realises just how dangerous his pesticide is, especially after his cat dies.
  • Obstructive Bureaucrat: Subverted. Forester thinks of Farrow this way, but Farrow is actually in the right.
  • Poor Communication Kills: Barbara gets poisoned and gets progressively more ill as the serial goes on, but hides it because... why?
    • Cannot Spit It Out: A lot of people seem to think this is a plot hole, but it's really just traditional British culture, stiff upper lip and all that. Everybody's already trying to get back to the TARDIS, so she feels explaining the poisoning would hurt them unnecessarily.
  • Pyro Maniac: The Doctor seems very enthusiastic about causing a gas explosion.
  • Smart Ball: Susan, with her observations about the nature of the insecticide. May simply be her failing to hold the Idiot Ball for once, given her Informed intelligence in the pilot and a few of her later episodes.
  • Two Scenes, One Dialogue: When they finally realize that no, they're not at the World's Fair.
  • Well-Intentioned Extremist: Smithers believes initially that his pesticide is the only way to avoid world starvation.
  • Yank the Dog's Chain: the uncontrollable TARDIS lands by chance back on Earth in Ian and Barbara's home period (early-60's London), but they're an inch tall and have no way of getting back to normal without taking off and getting lost again.