The Colossus of Rhodes (Part 2) - S2.E6

In Rhodes, the children find the whole island is paralyzed by fear of Magnus, the mythical figure who master-minds the slave trade. There are rumors that he is a giant. The only way to save the kidnapped children is to get right inside Magnus' palace and to get evidence of his evil. In the end, Lupus has to tackle Magnus and his henchman alone.