The Mysterious Castle On The Island Adventure - Captain Thomas returns once more in yet another thrilling adventure. Robert, Lionel, Joan, Joyce and Alastair their brave dog are holidaying in a log cabin next to Bouquet Lake. It also appears that the dastardly Captain Thomas has also decided to head for Bouquet Lake! On the lake there is an island and the ruins of the haunted Bouquet Castle, just waiting to be explored! Mysterious noises have been heard coming from the castle at night and the friends intend to investigate it! But what has all this got to do with Captain Thomas? What scoundrelly plan is Captain Thomas involved in? The mystery deepens!