"World War Three" is the fifth episode of the first series of the British science fiction television programme Doctor Who which was first broadcast on BBC One on 23 April 2005. It is the second of a two-part story which began with "Aliens of London" on 16 April. In the episode, set in London, the alien time traveller the Ninth Doctor (Christopher Eccleston) and his companion Rose Tyler (Billie Piper) team up with Rose's boyfriend Mickey Smith (Noel Clarke), her mother Jackie (Camille Coduri), and Member of Parliament Harriet Jones (Penelope Wilton) to foil the plan of the alien Slitheen family from selling the Earth for commercial purposes. The Slitheen, who have infiltrated the Government of the United Kingdom, plan to get the United Nations to release nuclear activation codes so they can trigger World War III on Earth and sell the remains. Plot Mickey is able to push aside the impostor police inspector advancing on Jackie in her flat. Escaping the electrical pulse of the Slitheen in 10 Downing Street, the Ninth Doctor attempts to get the police, but by the time he has returned the Slitheen get back into their suits. The Doctor escapes to the upper floors of Downing Street and reunites with Rose and Harriet in the Cabinet Rooms. Just before sealing off the rooms, the Doctor confronts the Slitheen and learns that they are a family rather than a race. The Slitheen tell him that they are not invading Earth but raiding it for some commercial purpose. Making contact with Mickey, the Doctor gives him instructions on how to log into the UNIT website on his computer. The Doctor uses the information to determine that the Slitheen ship is presently in the North Sea transmitting a signal. After the Doctor figures out the Slitheen are weak to acetic acid, Jackie and Mickey use gherkins, pickled onions and pickled eggs from Mickey's flat to kill the Slitheen who was impersonating the police inspector. Green and the other Slitheen declare a national emergency and request that the United Nations release the activation codes to launch a nuclear strike against a fictitious mothership. The Doctor realises that the Slitheen actually plan to fire the weapons against other countries in order to start World War III. The Slitheen plan to sell the Earth's radioactive remains as a fuel source, which they have already begun advertising through the signal. Through