Longleat keeper Caleb wants to find out who are the heroes and who are the zeros in lion country with a test of their intelligence. Calling on departments from across the estate, he tries to create a contraption that will see the lions work together as a team to release their food. Meanehile, Ben Fogle tries to mend his ways with Rio the tearaway cockatoo and Longleat's very own spiderman tries to save a rare arachnid.