Dalek (Hell Bent)
From Tardis Wiki, the free Doctor Who reference
A bronze Dalek attempted to gain access to the Matrix hidden underneath the Capitol on Gallifrey during the Cloister Wars. It was attacked by the Cloister Wraiths, where it became a part of the Matrix hard drive, being "filed". It was encountered by the Twelfth Doctor and Clara Oswald whilst they travelled through the Cloisters, where it begged to be exterminated, hinting at the pain and anguish it was in. (TV: Hell Bent)
Later, after the Spy Master had brought Gallifrey to ruin, Ko Sharmus activated the death particle on planet, destroying all organic life on Gallifrey. (TV: The Timeless Children)
