Doctor Who (TV Series)

Last of the Time Lords (2007)

Ellie Haddington: Professor Docherty

Photos 

Quotes 

• Toclafane : But then the Master came with his wonderful time machine to bring us back home.

  Professor Doherty : But that's a paradox. If you're the future of the human race, and you've come back to murder your ancestors. You should cancel yourselves out. You shouldn't exist!

  Martha Jones : And that's the paradox machine.