Recap / Doctor Who S6 E3 "The Invasion"
Not pictured: Horrifiying noise courtesy of The Great Old Ones' grandfathers.
"You're an evil man, Vaughn. You're sadistic. You're a megalomaniac. You're insane. I pity you. But if I get half a chance, I'll kill you."
Professor Watkins tells it like it is.

The TARDIS arrives in London in the near future, the Doctor and companions are enlisted by Isobel Watkins to find her uncle, a computer scientist working for International Electromatics.

IE's director, Tobias Vaughn, arouses the Doctor's suspicions - confirmed by meeting Lethbridge-Stewart again (see "The Web of Fear"), recently promoted to Brigadier, who says that numerous other IE staff have gone missing. Lethbridge-Stewart now heads the British arm of UNIT, the United Nations Intelligence Taskforce, charged with investigating alien sightings and other such things.

The Doctor discovers that Vaughn is acting on behalf of the Cybermen, who plan to invade Earth, but is also planning to double-cross them and seize power for himself. The Cybermen send a hypnotic signal through all IE-made equipment, immobilising most of Earth's population, and start emerging from London's sewers to take over. However, the Doctor has managed to protect himself and the others from the signal and succeeds in defeating the invasion, thanks in no small part to Zoe's phenomenal brain, plotting guidance trajectories for nuclear missiles to destroy the incoming fleet.

"The Invasion" presaged the shape of many Doctor Who stories to come, specifically the Third Doctor's era, featuring an alien invasion of Earth aided and abetted by a corrupt industrialist, with UNIT providing cannon fodder and the military connections to fight back.


  • Absentee Actor: Zoe is absent from the third episode and Jamie only appears in a pre-filmed insert in the last, in order to give Wendy Padbury and Frazer Hines a holiday.
  • Affably Evil: Tobias Vaughn. Very courteous, even to trespassers, as long as one is not hindering his plans. But when he gets upset...
  • All There in the Manual: In the novelisation, the Russian shuttle base is named Nykortny, an in joke referring to Nicholas Courtney.
  • Animated Adaptation: The two missing episodes were remade in an animated format for the DVD release.
  • Big Bad: Tobias Vaughn.
  • Call Back: There are numerous references back to the events of The Web of Fear and many mentions of Professor Travers and his daughter Anne. When Lethbridge-Stewart first appears, the Doctor refers to him as "Colonel" before being corrected.
  • Corrupt Corporate Executive
  • Cut-and-Paste Environments: The same set is used for Vaughn's office in two different buildings (with a different view out of the window). Lampshaded.
  • Cybernetics Eat Your Soul: Averted. Unlike the usual plot scheme, Vaughn is positively thrilled to have been given a cyborg body, and doesn't lose any of his personality.
  • Early Installment Weirdness: The first time we see Benton he's in civilian uniform, as there's more emphasis on UNIT being an international intelligence organisation. After this UNIT is always presented as being strictly military.
  • Evil Is Not a Toy
  • Expy / Suspiciously Similar Substitute: Professor Watkins and his niece Isobel, the Suspiciously Similar Substitutes written in when the actors of Professor Travers and his daughter Anne were unavailable for filming. Professor Travers and Anne are said to have moved to America, and Professor Watkins and Isobel fill their shoes extremely well. This is quite possibly lampshaded by the fact that the Doctor and companions mention repeatedly that they were hoping to meet Travers and Anne before finding out that the pair are gone, even though they are otherwise unimportant to the story.
  • For Inconvenience, Press "1": Written in 1968, a rare example of Doctor Who predicting the future effectively.
  • Getting Crap Past the Radar: Vaughn isn't exactly clear on what Packer will do to Isobel or Zoe if they're turned over to him, but it's as strongly implied as it can be in Doctor Who that they'll be raped.
  • Idiot Ball: Zoe, mainly to annoy Jamie, agrees to Isobel's insanely dangerous plan of photographing the Cybermen. Unlike Isobel, she's encountered the Cybermen before and ought to know better.
  • Immune to Bullets: Vaughn, thanks to voluntary partial Cyber-conversion.
  • Kidnapped Scientist: Professor Watkins.
  • Large Ham:
    • Viewers may remember Kevin Stoney from his former role as Mavic Chen. His hamminess has seen no decrease whatsoever.
    • Vaughn's assistant Packer also qualifies; he takes so much pleasure in his actions that he constantly looks like he's holding back a snicker.
  • Logic Bomb: Zoe uses ALGOL to blow up the computer receptionist.
  • Mad Eye: Vaughn's right eye is half-closed through most of the serial (due to injuries Kevin Stoney had suffered in a car accident), then opens wide when he turns against the Cybermen.
  • Magic Skirt: Well, kilt - the girls' skirts definitely don't do this, but Jamie's kilt stays in place. It's not magic, though - it's weighted.
  • Mega Corp.: International Electronics.
  • Modesty Shorts: A photograph taken while filming shows Sally Faulkner (Isobel) wore shorts under her dress for the scene where she's rescued by the helicopter. The animators reconstructing that sequence had other ideas.
  • Multinational Team: UNIT
  • Noodle Incident: The Cyber Planner tells Vaughn that he recognizes the Doctor and Jamie from Planet 14, a event we never saw.
  • Offscreen Moment of Awesome / Take Our Word for It - Partway through the story, the Doctor says that it's time that they rescued Professor Watkins. The very next shot features one of Vaughn's men describing in detail the incredible, action-packed rescue operation that UNIT carried out, yet we never got the chance to see (it was scripted, but there wasn't enough time to film it).
    • Ian Marter, who wrote the novelisation of the story, admitted that he was tempted to play the scene for laughs and reveal that all that had really happened was that the Doctor distracted Watkins' guard for a few moments while Benton rescued the professor, with the whole "rescue operation" being made up by the guard in the vain hope that Vaughn wouldn't execute him for his failure. In the end though, Marter kept the scene as it had originally been written.
  • Panty Shot: The two girls start in very short dresses (Isobel was shooting pictures using Zoe as a model) and stay that way for three-quarters of the episode - which does not make running from a private army or climbing up and down ladders easy to do modestly. They fail.
  • Put on a Bus: A BBC episode intro by the actor who plays Vaughn reveals that the roles of Watkins and his niece Isobel were originally written for Professor Travers and his daughter, Anne—but the actors weren't available at the time of filming, so Professor Travers and Anne are said to have moved to America, and Professor Watkins and Isobel fill their shoes.
  • Rank Up: Colonel Lethbridge-Stewart is now The Brigadier.
  • Redemption Equals Death - Vaughn. Well, sort of, since he claims he just wants revenge.
  • Series Continuity Error: The animated first episode depicts Zoe wearing the clothes that she later gets from Isobel, when she should be still wearing her glittery catsuit from "The Mind Robber". This may have been an error, or may have been due to a desire not to have to create a second character model.
  • Shout-Out:
    • In the animated first episode, the car that the Doctor, Jamie and Zoe hitch a ride with after the lorry driver is shot has the license plate H 23 63, which is a reference to the date of the original broadcast of "An Unearthly Child", the very first episode of Doctor Who, on 23 November 1963.
    • In the same episode, the words "Bad Wolf" (the story arc of the 2005 series) are written on Isobel's wall as an in-joke.
  • Spoiler Title: Unusually for Classic Who, averted. A BBC episode intro by the actor who played Vaughn reveals that the serial was originally to be named "Invasion of the Cybermen", but was shortened to avoid spoiling the Cybermen, who don't appear until halfway through the 8-episode serial.
  • The Starscream: Tobias Vaughn is working with the Cybermen to invade the planet, but plans to betray them and rule the world. He ends up helping to defeat the Cybermen but is killed by them.
  • Stock Episode Titles: 40 uses.
  • Stock Footage: The same stock footage of missile launchers is used repeatedly in episodes 7 and 8.
  • Surrounded by Idiots: Vaughn has his incompetent henchman Packer — unusual given his stated desire for efficiency.
  • Suspiciously Similar Substitute: Professor Watkins for Professor Travers and Isobel Watkins for Ann Travers.
  • Take Over the World: This is Vaughn's ultimate goal. Much like Kileg in "The Tomb of the Cybermen", he goes on a rant about how the world is a disorganized mess of conflicting ideals, and only his superior intellect could bring it together to solve all its problems.
  • Talking the Monster to Death: Zoe talks IE's computer receptionist to death with a Logic Bomb. Vaughn finds it Actually Pretty Funny.
  • 20 Minutes into the Future: Takes place 4 years after "The Web of Fear" which would theoretically put it in the very early 70s. (See that article for more, and for the beginnings of the infamous "UNIT Dating Controversy".)
  • Uncanny Valley (In-Universe): The Doctor notices that Vaughn doesn't blink as often as a human should, a sign that he has a cyborg body.
  • Utopia Justifies the Means - Unlike most Corrupt Corporate Executives, Vaughn believes in a greater good that justifies what he's doing.
  • Villainous Breakdown: Tobias Vaughn goes from his usual cold and calculating personality to launching a raging freakout at an underling (and once, to the Doctor) in every single episode of the story that he's in.
  • Wham Line: The Doctor to Tobias Vaughn at the end of Episode Seven (and, by extension, the beginning of Episode Eight):
    The Doctor: Is this what you wanted, Vaughn?! To be the ruler of a dead world?!?!
  • What Happened to the Mouse?: Whatever became of Rutledge? The novelisation has Vaughn ordering him to shoot himself. According to some sources, this was meant to happen in the TV version as well, but didn't.
  • Whole Plot Reference: The plot is similar to Quatermass II, though not as much as some other stories.
  • You're Insane!: Professor Watkins says this to Vaughn about his plans.