"I have come to destroy you Doctor, once and for all!" The Earth is in terrible danger! The Master is back with an evil scheme to destroy humanity and silence the Doctor forever. His plan: To awaken the awesome power of the Nestene-a ruthlessly aggressive alien life form. Once mixed with plastic, they will form into faceless automatons, a willing army of destruction easily controlled by the evil Time Lord himself. This is the terrible threat now facing the Earth-the terror of the Autons. Aided by the Brigadier and his enthusiastic new assistant, Jo Grant, only the Doctor can combat their evil power, but first he must defeat the Master... Originally transmitted in color January 2nd-23rd 1971, this four part adventure starring Jon Pertwee was lost in its original form. Only a black and white version and an edited color American NTSC standard version remained until now when technology worthy of the Doctor himself has reconciled the two, synchronising them into one full color version.