Earthshock is the sixth serial of the 19th season of the British science fiction television series Doctor Who, which was first broadcast in four twice-weekly parts on BBC1 from 8 to 16 March 1982. This serial marks the final regular appearance of Matthew Waterhouse as Adric and his climactic death, with the final episode featuring unique silent credits in memory of the character. It is also the first to feature the Cybermen since Revenge of the Cybermen in 1975. The serial is mainly set on Earth and a deep space freighter in 2526. In the serial, the Cybermen plot to wipe out Earth, where a conference of multiple planets are planning to form a military pact to defeat the Cybermen in a war. Plot As the TARDIS materialises in Earth's future, Adric argues with the Fifth Doctor about the lack of attention and respect he receives compared to Nyssa or Tegan. They explore a series of caves and are caught by soldiers led by Lieutenant Scott; Professor Kyle, accompanying Scott, accuses the four of killing the rest of her archaeological team. The Doctor convinces them to help, and Kyle leads them to the bodies of her team, near where they find an odd metal hatch. The group is attacked by androids, killing some of Scott's men, but the Doctor defeats them. He suspects the androids were guarding the hatch, and eventually opens it to reveal a powerful bomb that could destroy the planet. The Doctor and Adric defuse the bomb and trace its signal back to a freighter that is entering the Solar System. Scott and Kyle join the Doctor as they return to the TARDIS and travel to the freighter. The Doctor instructs the others to wait in the TARDIS while he and Adric explore the ship, and find a similar number of corpses in the cargo holds, before they are caught by the ship's security and taken to Captain Briggs, where they try to explain their situation. Throughout this, the Doctor and the humans are unaware that they are being monitored by the Cybermen, who seek to destroy the Earth. With the bomb defused on Earth, and the Doctor now interfering here, the Cyber Leader decides it is time to take command of the freighter. They leave the sealed containers they stowed away in, and begin to march to the bridge. The ship's crew, along with help from