explodes on hitting the ground. Tegan is injured and blacks out. Only Styles, Mercer, and two guards are left alive of the original crew. Disguised in uniforms taken from Lytton's guards, they plan to blow up the station via its self-destruct system. Davros vows to take his revenge on the Doctor. While Davros's travel chair is undergoing maintenance, Lytton explains that the Daleks lost their war against the Movellans because of a virus that attacks Dalek tissue. They have awakened Davros to find a cure. He demands that he remain on the ship while working on the virus. When Lytton leaves to discuss this with the Supreme Dalek, Davros uses a hypodermic-like mind control device to take control of Kiston. The Doctor and the bomb disposal squad search for the Kaled mutant that was housed inside the destroyed Dalek. They kill it when it wounds one of the men. The Doctor and Stien head into the TARDIS to see what is happening at the other end of the time corridor. The TARDIS materialises inside the Dalek ship and the Doctor tells Stien that they should find Turlough and leave. But Stien reveals that he is an agent of the Daleks. A Dalek patrol closes in to exterminate the Doctor, but Lytton enters and tells them that the Supreme Dalek has ordered that the Doctor be taken alive. The Daleks lead the Doctor away. Turlough joins the remnants of the ship's crew, telling them that the time corridor might help them escape the effects of the ship's self-destruct. On Earth, the man attacked by the Dalek is disorientated. The group commander, Colonel Archer, decides to radio for help; he seeks help from two policemen (Lytton's associates). As he tries their radio, a policeman holds a gun to his head. The Daleks plan to clone the Doctor and his companions, using them to assassinate the Gallifrey High Council. Styles and two station guards are killed when trying to activate the self-destruct system. On Earth, Colonel Archer's clone goes to the warehouse under Dalek control. The bodies of Colonel Archer and his men are seen aboard the Dalek ship. Tegan attempts to escape but is recaptured and taken to the Dalek ship. The squad's scientific advisor, Professor Laird, is shot while trying to flee. Davros demands tissue to find a cure. After consulting The Supreme Dalek, they agree but Davros uses the mind