After getting shot down by a gang, the doctor went through surgery but due to having two hearts the doctors messed up causing him to regenerate into a new man and he fights the master.

After smashing his head off the TARDIS console when it was getting shot, his face makes a glowy swirly pattern and changes to this face and he will fight: The Rani Kroagnon The Bannermen Kane The Daleks The Kandyman Cybermen Chief clown The Gods of Ragnarok Morgaine Ghosts Fenric The human cheetahs.

After suffering from a deadly disease the doctor regenerates once again into a new man and will fight: Mestor Cybermen Sil The Master The Rani Sontarains Karfel Davros and the Daleks The Valeyard And he is put on trial and is punished to face undescribable things.

You continue to travel with the doctor and together you fight: - Daleks - Solicitor Gray - Professor Zarrof in the city of Atlantis - Cybermen on the moon in the year 2070 - The Macra - fight chameleons in the year 1966 (present) - Daleks - Cybermen - The Yeti, created by the great intelligence - Ice Warriors - Yeti - Salamander who can disguise himself as the doctor - parasitic seaweed - Cybermen - The Dominators - The Master Of The Land And Fiction - Cybermen - Krotons - Ice Warriors - And his final battle is with the War Lords