Alpha Centauri (planet)

Alpha Centauri was the home planet of the Alpha Centauran race. It was also a part of the Galactic Federation and served as its headquarters in 3375. (TV: The Curse of Peladon, The Monster of Peladon, PROSE: The Dark Path)

When the Cybermen allied with Rassilon to rewrite all of history, Alpha Centauri was rendered lifeless by Cyberman forces. This version of history was undone by the Twelfth Doctor and Rassilon. (COMIC: Supremacy of the Cybermen)

Behind the scenes

 * An invalid reference to Alpha Centauri occurs in a Doctor Who mini-scene broadcast in 2009 during the talent show Tonight's the Night, in which Jack Harkness states he once went to a party there.