But the Fourth Doctor's intro still feels special and continues ... And of course, the iconic diamond logo. It's all blended ...

Also, the Cloister Bell chimes. This was first heard in the Fourth Doctor's final story, Logopolis. This is the first episode to feature the new logo. Appropriately, it's the eleventh Doctor Who ...

The Doctor references the Nimon, a technologically advanced race that resembled Minotaurs. They were defeated by the Fourth Doctor in The Horns of Nimon. Joe's verse ('Here comes a candle to light ...