During WWII, a mysterious cylinder is being guarded by the army, while homeless children, living on the bombsites, are being terrorised by an unearthly child. With Michelle Ryan. David's video ...

are being terrorised by an unearthly child. Meet the new Doctor! See the Doctor regenerate! ...of the Tenth Doctor. Get the latest updates Keeping On Your Toes Watch Ernie Vincze BBC iD ...

Early versions of the script gave it the title An Empty Child - a reference to the first Doctor Who story An Unearthly Child. It also had the working title of World War II at one point.