Mark and Lisa must help their Uncle George prevent an ancient and mysterious box - the doorway into a dark and menacing world - from ever being opened.
Deep underground lies a mysterious box, left on earth by the rulers of Heritron, who plan to use it to enslave the human race. Mark and Lisa find the second ... read more
The doorway to Heritron is opened, though when George and the children escape from the Janus foundation they are betrayed by Erica, who is revealed as a watc... read more