Death to the Daleks is the third serial of the 11th season of the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 23 February to 16 March 1974. The narrative begins as the spaceship TARDIS suffers an energy drain and crash-lands on the planet Exxilon. The Doctor (Jon Pertwee) and his companion Sarah Jane Smith (Elisabeth Sladen) are subsequently embroiled in a conflict between the Daleks and the human Marine Space Corp expedition, over the mineral "Parrinium" which can cure and give immunity from a deadly space plague. This was the last serial to have an episode wiped.