Rusty is a Dalek which first appears in Doctor Who Series 8 episode 2 "Into The Dalek". Some time later, Rusty reappears during an incursion between the Doctor, Alyssa and Clara, and the Daleks, saving the three from imminent extermination. Rusty informs the Doctor of an impending Dalek invasion of a Level 5 planet, similar to Earth, and joins them in saving the planet from the Daleks. Rusty appears at this time with notable upgrades in firepower and defenses purposed for battle superiority against his own kind. Rusty reappears in later episodes, assisting the Doctor and his companions in fighting Daleks and Cybermen.