I seem to remember hearing about a dr who episode where one of his companions is in mortal danger and the only way she can be saved is if the Doctor surrenders his regenerative powers to beings known as the Watchers. The end event of this is when the 4th Dr falls and the watcher appears. Can anyone name the episode? I'm aware of Logopolis but the name of the epsiode of which dr it was that surrendered his powers of regeneration to the watchers?
Please let me know if you can
thanks
Jason










