Cast
- Peter Davison (The Doctor)
- Sarah Sutton (Nyssa)
- Janet Fielding (Tegan Jovanka)
- Honor Blackman (Anahita)
- Adrian Lukis (Byzan)
- David Warner (Siris)
- Vernon Dobtcheff (Shamur)
- Matt Addis (Albis)
- Emerald O'Hanrahan (Mira)
- John Banks (Radulf Varidi)
Doctor Who - The Lost Stories
3.3. Doctor Who: The Children of Seth
Written by Christopher Bailey Marc Platt
Starring Peter Davison Sarah Sutton