The Master has stolen a weapon that will give him the ultimate control of the universe and of time itself. The Daleks are invading Earth. The Cybermen are terrorising the space lanes. And the Sontarans and Rutans are battling to see who wins the galaxy. Only YOU, the Time Lords and Companions of the Celestial Intervention Agency, can stop these villains from changing the course of history. Your weapons are your wits and your TARDIS. To join the Doctor in his adventures to defeat the foes of the universe, you only need your imagination, a pencil, some paper, and this game!