10 Doctor Who Villains Who Ultimately Turned Good

Luke Rattigan is one of the most easy-to-hate villains we've ever had in Doctor Who.

A spoiled rich-kid who thought that his genius made him "better" than everyone else, Rattigan - who was rude, unlikeable, and generally a bit of a douche - allied himself with the Sontarans in a Series 4 two-part story, helping them poison the Earth.

The frustrating thing about Rattigan is that his unparalleled intellect could've been used as a major force for good if his heart was in the right place, so it was quite satisfying when - at the end of the second episode - his cleverness saved the day.

Reprogramming a teleporter to give him access to the Sontaran ship, Rattigan stared the potato-esque soldiers right in the face and triggered a massive explosion, sacrificing himself in order to defeat the Sontarans and save the Doctor's life.

Rattigan made many mistakes in his short life - such as nearly killing millions of innocent humans - but his final act was truly selfless. Sontar-ha!