On a spaceship headed straight for the centre of the sun, the Doctor only has 42 minutes to save Martha and the ship's crew from an inevitable doom.
Episode rating
Cast of episode
84
12
- Martha Jones
- The Doctor
- Kath McDonnell
- Francine Jones
- Riley Vashtee
- Orin Scannell
- Hal Korwin
- Dev Ashton
- Abi Lerner
- Erina Lessak
- Sinister Woman