Fun fact Capaldi (much like Tennant) is a lifelong super-Whovian, he even got to visit the set and meet Jon Pertwee when he was a teenager, and he'd been trying to get someone to dangle him literally any part in the show, so here he is. Little did he know that one day he'd get the TARDIS key himself. Glad to see him, Twelve is my Doctor, even though he was the last one I experienced (minus Thirteen).