Starring Colin Baker as the sixth Doctor and Alex Macqueen as the Master. Somewhere off the South Coast of England, there's a lonely island. On that island stands a solitary castle, long since abandoned. Haunted, they say. But the truth is, that castle houses something far worse than mere ghosts. The castle is what lies at the end of a trail followed by the Doctor in search of several missing scientists, all of them connected to the top secret Dominus Institute and its elusive CEO, Sir Andrew Gobernar. But the Doctor will soon discover that he's the one being haunted, by a ghost from his past. Or perhaps, his future.