Doctor Who and the Three Doctors

Jo glanced up at the Doctor. 'Things must be pretty serious then.' 'They are, Jo. Very serious indeed. The whole of the Universe is in danger!'

The most amazing WHO adventure, in which Doctors One, Two and Three cross time and space and come together to fight a ruthlessly dangerous enemy – OMEGA. Once a Time Lord, now exiled to a black hole in space, Omega is seeking a bitter and deadly revenge against the whole Universe...

DOCTOR WHO scripts — awarded the 1974 Writers' Guild Award for the best British children's original drama script.