But Professor Keller is in truth the Master and the Keller Machine is more than a mere machine. Soon the Doctor is involved in a bitter struggle with his deadliest enemy, a alien mind parasite, and a diabolical scheme to plunge the entire world into a Thrid World War ...
 

IN BLACK AND WHITE - DIGITALLY REMASTERED

Originally made in colour, this exciting six-part story now exists only in black and white. But as a special bonus, the only surviving colour footage from The Mind of Evil - approximately five minutes from episode six - is included on the end of this tape!

The Doctor and Jo are investigating a revolutionary new way of treating psychotic criminals at Stangmoor Prison - a machine invented by one Professor Keller that literally sucks the evil out of a man's brain. But when the process is complete, what is left behind - a saint or a simpleton?

It transpires that Professor Keller is the Doctor's arch-enemy, the Master. The machine actually houses a deadly mind parasite that the Master has taken to Earth for his own evil ends. He intends to use it to sabotage the global peace conference UNIT is policing, thus bringing Earth to the brink of war. And when he takes over the prison and hijacks a missile that could wipe out half of Europe, it seems the cards are stacked firmly in his favour.

Meanwhile, the mind parasite is growing stronger all the time, killing anyone in its path by making them experience that which they fear the most. Can the Doctor defeat both the Master and the parasite while preventing the world's major powers from embarking on all-out nuclear war?

Black and White
Produced by Barry Letts
Directed by Timothy Combe
Duration: 154 mins approx.
 

US Cover