It’s very interesting what’s happened to Jenna. Everyone knows Capaldi’s going to be great but I think the shocker is just how great he makes Jenna. From a Doctor she could sort of control, because he had a crush on her, she’s landed with a Doctor who barely registers that she’s a girl. They’re great friends and all that but she has to be his human interface with everybody else. She’s much funnier, more exasperated.