At the conclusion of a chase through time by Daleks, Ian and Barbara used the Dalek time machine to go home ("The Chase"), and their place in the TARDIS was taken by a future space pilot named Steven Taylor, who had been captured by the robot Mechanoids but escaped due to the Dalek attack. The Doctor met another member of his own race for the first time in the form of the Meddling Monk and had an adventure in Galaxy 4. During the siege of Troy, Vicki decided to leave the TARDIS to stay with Troilus, adopting the name Cressida. The Doctor and Steven were next briefly joined by Trojan slave Katarina and a security agent from 4000 AD Sara Kingdom, but both were killed during the events of "The Daleks' Master Plan", where the Daleks plotted to invade Earth's Solar System in 4000 AD, before being destroyed when the Doctor activated their weapon the Time Destructor. Due to this he was aged significantly; the effects on Sara were enough to reduce her to dust.