Michael Wisher

The Doctor and UNIT race to prevent the Master from broadcasting the deadly activation signal and opening the channel for the Nestene’s arrival on Earth.

The TARDIS takes the Doctor and Sarah to the planet Zeta Minor on the edge of the universe. An unseen menace has wiped out an Morestran expedition and haunts the alien jungle.

The Doctor follows the Master’s trail to the circus. Meanwhile, the Master has used his hypnotic powers to take control of a plastics factory where he creates the deadly Autons.

The Master, a renegade Time Lord and a rival of the Doctor’s, arrives on Earth and paves the way for an invasion by the insidious Nestene Consciousness.

The Doctor and Sarah are held responsible for the deaths on Zeta Minor, but the Doctor knows that the real culprit comes from the mysterious universe of antimatter.

Lost in the universe of antimatter, the Doctor communes with the creature and makes a bargain. Sarah discovers Professor Sorensen’s dark secret which threatens to overwhelm him.