"Auld Mortality" has the Doctor, Geoffrey Bayldon (=Catweazle), musing about what might have happened if had given in to that impulse he had so many years ago of leaving with his granddaughter, rather than staying at home to become a writer of time-travelling adventure narratives. Susan, still played by Carole Ann Ford, drops by to find out what is up with her half-forgotten relative. The play is by Mark Platt, who is not always comprehensible (see Lungbarrow, Downtime, Ghost Light), and I confess I didn't quite understand everything that was going on (specifically, I did not get who or what "Auld Mortality" actually was supposed to be), but the ride was fun, the acting is great (Ford's Susan being particularly memorable) and I loved the way Platt manged to have two endings to the story, having his cake and eating it. ( )