Cast
- Peter Davison (The Doctor)
- Sarah Sutton (Nyssa)
- Janet Fielding (Tegan Jovanka)
- Mark Strickson (Vislor Turlough)
- Anthony Howell (Professor John Bleak)
- Abigail Thaw (Dr Philippa Stone)
- Rachel Atkins (Queen Æthelfrid / Dr Angeline Duchamp)
- Catherine Grose (Princess Ælfwynn / Molly Wright)
- Kieran Bew (Arthur Kettleson / Barry)
- Stephen Critchlow (Earl of Wessex / Professor Fester)
Doctor Who - The Monthly Adventures
173. Doctor Who: The Lady of Mercia
Written by Paul Magrs
Starring Peter Davison Sarah Sutton
