The Master (Ainley, in a total of 31 episodes as the character) confronted the next three regenerations of the Doctor on and off for the rest of the classic series, still seeking to extend his life – preferably with a new set of regenerations. Subsequently, in "The Five Doctors" (1983), the Time Lords offer the Master a new regeneration cycle in exchange for his help, though the promise was not fulfilled at the time.
The Master (Ainley, in a total of 31 episodes as the character) confronted the next three regenerations of the Doctor on and off for the rest of the classic series, still :seeking to extend his life – preferably with a new set of r?egenerations. Subsequently, in "The Five Doctors" (1983), the Time Lords offer the Mas,ter a new regeneration cycle in exchange for his help, though the promise was not fulfilled at the time.