A newly exiled Doctor accompanies Liz Shaw and the Brigadier
to a symposium held in an imposing Scottish castle. Professor MacLeod and her
son have developed a new treatment for memory loss and a possible cure for
dementia.



As the Doctor investigates sightings of strange mythical
creatures, and ghosts are unleashed in the castle’s corridors, Liz and the
Brigadier search for a connection.



Just what is happening to the energy produced by the
MacLeods’ revolutionary treatment? And what is the strange creature that hides
in the castle grounds?

Composed by: Steve Foxon, Nicholas Briggs