The BBC have released the synopsis for the September 27th episode of Series 8 The Caretaker. No time when it will air but it seems this season so far has had a pretty stable 7:30PM time slot.
The terrifying Skovox Blitzer is ready to destroy all humanity –
but worse, and any second now, Danny Pink and the Doctor are going to
meet. When terrifying events threaten Coal Hill school, the Doctor
decides to go undercover.