The deep-space trading post of Iceworld, the far future. The Doctor, Mel, their old friend Glitz and time-lost waitress Ace go in search of a fabulous treasure, supposedly guarded by a fire-breathing dragon. But what is the link between the treasure and Iceworld's proprietor, the frosty Mr Kane?
Elenco: William Hartnell , Patrick Troughton , Jon Pertwee , Tom Baker , Peter Davison , Colin Baker , Sylvester McCoy .