ARRIVING ON THE SNOWBOUND OOD-SPHERE IN the year 4126, the Doctor and Donna Noble discover a fatally injured Ood who tells them, “The circle must be broken.” They follow the flight path of a rocket ship to the sprawling factory complex of the Ood Operations company; there they join a recently arrived group of buyers at a promotional reception hosted by Solana Mercurio, head of marketing and galactic liaison.