The Android Invasion

In the village of Devesham, the Doctor and Sarah Jane meet a group of humanoid robots in white suits and opaque helmets, who shoot at them with their index fingers. The Doctor and Sarah Jane flee to a pub, where the villagers wait motionless until the clock strikes, when they suddenly come to life, acting normally.

The Doctor finds his way to the local Space Defence Station and introduces himself to Senior Defence Astronaut Guy Crayford, who places the Doctor in a cell. It is revealed that Crayford is working for Styggron, the leader of an alien race called the Kraal. Sarah frees the Doctor and they escape, but they become separated and Sarah is captured. Styggron tells Crayford to locate, but not seize, the Doctor.

The mask of Styggron, at the National Space Centre.

The Doctor returns to the village and encounters an android copy of Sarah Jane, sent to test his knowledge and abilities. The real Sarah is kept alive so Styggron can test the virus he intends to use on Earth. The Doctor escapes from the android but is recaptured and locked up with the real Sarah. The Doctor explains that the Kraal planet will soon be uninhabitable due to high levels of radiation, so the Kraal plan to eradicate humanity and take over Earth. The duplicated village was a training ground. Crayford explains that he is helping the Kraals because they rescued him and reconstructed his body, while Earth left him for dead.

Sarah and the Doctor escape aboard Crayford's rocket and travel to Earth to warn the real defence station, while being followed by android duplicates of themselves. They land separately on Earth in their pods, and Sarah finds the TARDIS in the woods. When Crayford's rocket lands, Colonel Faraday and Harry Sullivan head there, not knowing that Styggron is there with Crayford. The real Doctor enters the Station and meets Benton, who tells him where Harry and Faraday are. The Doctor contacts them by radio and urges them not to enter the rocket.

The real Doctor explains the Kraal invasion to Faraday and Sullivan, but they have been replaced. The android Doctor enters and threatens the Doctor with a gun but he escapes. After dodging pursuit, the Doctor makes his way back to the Space Defence Station's control room, where he had given a technician instructions to prepare a device that would disable the androids. The android Doctor intervenes and holds the Doctor at gunpoint, preventing him from activating the device, but Crayford enters, saying that Styggron promised no killing. The real Doctor tells him that the Kraal did not reconstruct him, but merely brainwashed him. Realising the truth, Crayford rushes out, distracting the android long enough for the Doctor to make his move. In the struggle, the Doctor activates the device, which jams all the androids in mid-step.

Meanwhile, Crayford attacks Styggron on his ship. The two grapple and Styggron shoots Crayford. The Doctor enters and defeats Styggron, using his reprogrammed duplicate android as a distraction.

East Hagbourne, Oxfordshire, used as the location for the village of Devesham

The story was influenced by the film Invasion of the Body Snatchers (1956), and would be the last Terry Nation script for Doctor Who for four years until his final script for the series, Destiny of the Daleks (1979). This was the first script by Nation since The Keys of Marinus (1964) that did not feature the Daleks.

Location filming for the Kraal-replicated village of Devesham took place in East Hagbourne, Oxfordshire, a few miles from Didcot. Scenes outside the Space Defence Station were filmed at the National Radiological Protection Board at nearby Harwell.[1]

The depiction of androids was similar to other television series of the period, such as The Bionic Woman

Kenneth Williams briefly mentioned viewing episode two of this story in his diaries, writing on 29 November 1975 "Doctor Who gets more and more silly."[6] Paul Cornell, Martin Day, and Keith Topping gave the serial a negative review in The Discontinuity Guide (1995), writing that it was "stupid, tiresome and very irritating".[7] In The Television Companion (1998), David J Howe and Stephen James Walker reported that the serial had a mixed reception. They wrote that the Kraals were "somewhat unoriginal but otherwise reasonable addition", with average effects and the actors making the most of it. They also praised the direction, but wrote that the plot was too far-fetched.[8] In 2010, Mark Braxton of Radio Times awarded it two stars out of five, writing that The Android Invasion was the weak link in the season. He criticised the plotting and use of UNIT, but was more positive towards the way the story played around with the android duplicates of characters.[9] DVD Talk's Ian Jane gave the serial three-and-a-half out of five stars, saying that it "may not be the deepest or for that matter the most original of stories told in the series but it's a fun tale that breezes by at a good pace". He praised the location work and the androids and white robots.[10] SFX reviewer Ian Berriman also criticised the far-fetched plot, but said that it was "as enjoyable as it is unlikely".[11]

The Android Invasion was reviewed favourably by John Kenneth Muir, who described it as "an atmosphere-laden suspense thriller", despite finding some deficiencies in the storyline, which he referred to as an idiot plot. Muir praised the conceit of frightening, android duplicates of familiar people, and he traced influences from the films Invasion of the Body Snatchers (1956) and The Stepford Wives (1975). He also notes the similarity of the depiction of androids in Doctor Who to the Fembots that appeared the following year in The Bionic Woman television series ("Kill Oscar", 1976), with "faces filled with circuitry and round, lifeless orbs for eyes". Another familiar science-fiction device used in The Android Invasion is that of artificial duplicate settings; Muir considered that the "fake" village of Devesham imitated scenarios seen in earlier television series such as Star Trek ("The Mark of Gideon", 1969), UFO ("Reflections in the Water", 1971) and Space: 1999 ("One Moment of Humanity").[12]

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• The Android Invasion at BBC Online