The Doctor and Peri are summoned to the planet of Necros to pay their respects to the Doctor’s friend Arthur Stengos.  What they find is a facility called Tranquil Repose where the rich of the galaxy have their bodies cryogenically frozen until a time when they can be cured of their ailments and the ‘Great Healer’ turns out to Davros, who is creating a new army of Daleks loyal to his cause.