History[edit | edit source]
The Memeovore came to Tersurus during the War in Heaven and consumed the Tersurans' forms of communication, so they had to evolve other, more tenuous forms (PROSE: The Taking of Planet 5) using farting. (TV: The Curse of Fatal Death)
When the Master travelled with Susan Foreman in his TARDIS to Tersurus, it was a lifeless planet with barely anything but rocks and lichen. Susan attacked the Master and left him to die there. (PROSE: Legacy of the Daleks) According to another account, however, the Master attempted to attack a Time Lord outpost on the planet, and was left disfigured after a confrontation with a future incarnation, as part of a plan to join the Cult of the Heretic. (AUDIO: The Two Masters) In any event, a signal sent to Gallifrey by the Master's TARDIS drew Chancellor Goth to Tersurus, where he found the disfigured body of the Master. (TV: The Deadly Assassin)
The Master then make one final attempt to destroy the Doctor and his companion, Emma, by plunging them into the vast, labyrinthian sewers of Terserus. he did so by previously traveling back in time and bribing the architect of the palice to hide a trap door. However, the Doctor at this point was so used to battled with his ultimate foe that he had predicted this, also going back in time to bribe the architect to instead place the Sofa of Reasonable Comfort. Through a series of further subversions, the Master soon found himself plunged into the sewers.
The sewers being so vast and complex, as well as disgusting and treacherous, it took the Master himself 312 years to escape from them, being repeatedly knocked into the sewers on three separate occasions, requiring the Daleks to regress him back to a more youthful state. (TV: The Curse of Fatal Death) Perhaps in reference to this event, Missy recalled once climbing through the sewers on Tersurus. (AUDIO: The Bekdel Test)