Last of the Time Lords

"Last of the Time Lords" is the thirteenth and final episode of the third series of the revived British science fiction television series Doctor Who. It was broadcast on BBC One on 30 June 2007. It is the last of three episodes that form a linked narrative, following "Utopia" and "The Sound of Drums". The episode is set on Earth one year after the events of "The Sound of Drums". In the episode, the alien time traveller the Master (John Simm) has conquered the Earth and enslaved its population to prepare warships for him to conquer the rest of the universe. The medical student Martha Jones (Freema Agyeman) has spent the previous year travelling the planet as part of a plan to stop the Master. Plot A year after the Toclafane attacked Earth and the Master took over the planet, humanity is on the verge of extinction. After her escape from the Valiant, Martha has been travelling around the world and avoiding detection. She has been preparing the surviving humans to concentrate their thoughts on the word "Doctor" the moment of the completion of the countdown to the launch of a fleet of rockets the Master is readying to wage war. The Tenth Doctor meanwhile has been spending a year psychically integrating himself into the Master's Archangel network of satellites, which channels the collective psychic energy of the people to the Doctor. Martha creates a cover story about finding four components to a gun the Master is vulnerable to as part of a plan to have Professor Docherty lead Martha back to the Master.