The Doctor and Donna arrive on the Ood-Sphere where multiple Ood are succumbing to red-eye or going insane. Why are these horrible transformations occurring and what other agendas do Ood Operations have up their sleeves? What do the Ood mean when they say, ‘the circle must be broken’ and are the Ood really meant to serve humanity, or are they a race destroyed by corporate greed? A vibrant garden showcasing diverse plant life. Cast David Tennant (The Doctor), Catherine Tate (D