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...
Jon Pertwee | The Doctor |
William Hartnell | The Doctor |
Patrick Troughton | The Doctor |
Katy Manning | Jo Grant |
Nicholas Courtney | Brigadier Lethbridge-Stewart |
John Levene | Sergeant Benton |
Stephen Thorne | Omega |
Rex Robinson | Doctor Tyler |
Roy Purcell | President of the Council |
Laurie Webb | Mr. Ollis |
Clyde Pollitt | Chancellor |
Graham Leaman | Time Lord |