Against all odds, Voldemort discovers the existence of Time Lords and decides that he wants their secrets for himself. How far will he go, and will the Doctor be able to stop him? And, more importantly, what effect will this have on the wizarding world?

When the Doctor lands at Hogwarts, he persuades Dumbledore to start a new subject: Science. How will the trio react to their eccentric Science Professor? Was the object that crashed in the Black Lake really a meteorite? With mysteries abound, it is up to the Doctor to save Hogwarts from an extraterrestrial attack, as well as the might of Voldemort and his Death Eaters.