Ben Fogle and Kate Humble explore life behind the scenes at Longleat Estate and Safari Park. The vet has to perform an emergency operation on Lily the pygmy goat. Lord Bath portrays his ancestor, the 4th Marquis, who left the biggest mark on Longleat. Kate discovers what the marmosets make of the world's favourite pongs, while Ben reports on Longleat's mass incubator and sees eggs turn into chicks!