Why did Romana finally leave the Doctor? Who was the Guardian of the Solar System who betrayed it to the Daleks in the 41st century? How many actors have played the part of the Doctor? Why was the fourth Doctor forced to regenerate? How much do you know about Doctor Who? Now you can find out in this specially compiled book of over 750 questions on the Doctor's adventures and enemies he has fought in time and space. There are quizzes on the Doctor’s companions, the Daleks, the Cybermen, the Time Lords and others plus a special section on the people behind the scenes of the TV programme.