The Three Doctors

A weather balloon, with equipment, returns to Earth. Doctor Tyler is called, and the local warden goes to fetch it, but disappears. When Doctor Tyler starts to examine the equipment he gets some strange results, and he takes his findings to U.N.I.T. The Doctor examines the slides, and finds a strange effect.

Later the Doctor and Jo are besieged by a strange entity, and they manage to escape to the safety of the TARDIS, along with the Brigadier who has never been inside. Fearing that it may be too much for him the Doctor signals Gallifrey for help, but they are suffering from a power drain and are unable to help.

They do manage to obtain enough energy to break the first law of time and send the Doctor's 2nd incarnation to help, but the two only argue. Using the last remaining energy the Time Lords send the Doctor's 1st incarnation, although he is trapped in a limbo and can only advise from the scanner.

Together the Doctors realise that the entity is from an anti-universe, and the third Doctor and Jo, and later the second Doctor with U.N.I.T. HQ cross over to a black hole where they find a legend of the Time Lords - Omega. Omega is unable to escape from the black hole, and hopes to use the Doctors. However, together they manage to defeat Omega, and return everyone before the black hole is destroyed, restoring power to the Time Lords.

• The Doctor: William Hartnell, Patrick Troughton;
• Doctor Tyler: Rex Robinson;
• Arthur Ollis: Laurie Webb;
• President of the High Council: Roy Purcell;
• Time Lord: Graham Leaman;
• Chancellor: Clyde Pollitt (1-2);
• Corporal Palmer: Denys Palmer (1-2);
• Mar Ollis: Patricia Pryor (1,4);
• Omega: Stephen Thorne (2-4);


• UNCREDITED CAST:
• Omega's Champion: Alan Chuntz (3-4);
• Gell Guards: Murphy Grumbar, John Scott Martin, Rick Newby, Cy Town;
• Time Lords: Peter Evans, Tony Lang, Richard Orme, Lincoln Wright;