- Jodie Whittaker (The Doctor)
- Mandip Gill (Yasmin 'Yaz' Khan)
- John Bishop (Dan Lewis)
Episode: Human Nature (1)
Air Date: 2007-05-26
Runtime: 48 min
England, 1913. A schoolteacher called John Smith dreams of adventures in time and space. The Doctor, along with Martha, heads to a boarding school, but what he finds is far from ordinary...