- Jodie Whittaker (The Doctor)
- Mandip Gill (Yasmin 'Yaz' Khan)
- John Bishop (Dan Lewis)
Episode: The Great Detective (Children in Need)
Air Date: 2012-11-16
Runtime: 4 min
Matt and Jenna introduce the Doctor Who Christmas Prequel, The Great Detective, in which Vastra, Jenny and Strax try to persuade the grumpy Doctor to engage again.