*Alien pirates, and sea-faring friends abound in this incredible Treasure Island and Doctor Who crossover.*''Who was that?'' asked Clara. ''And what are pieces of eight?''The Doctor smiled. ''Robert Louis Stevenson. I did tell you.''Summoned to 1700s Plymouth, the Doctor and Clara must investigate a mysterious thievery from the Crown of King George.Their travels take them to a remote island - but as the secrets of the theft are unearthed, the Doctor discovers something far more sinister. The spectre of a terrible intellect is afoot.Thankfully, the Doctor and Clara won''t be alone. A pirate called Long John Silver, a runaway called Janey Hawkins, and professor called River Song, are all along for the ride.