Time itself is in peril! The Time Lords and UNIT find themselves besieged by a mythic figure from the Time Lords' past hell-bent on destruction. The only way to defeat him is to break the First Law of Time and let the Doctor help himself — literally...
Doctor Who: The Three Doctors (1973) is currently not available on any services.
Jon Pertwee , Patrick Troughton , William Hartnell , Katy Manning , Nicholas Courtney , John Levene
Lennie Mayne
BBC