When Zoe reattaches an old piece of equipment to the TARDIS console, she, Jamie and the Doctor are very lucky to avoid a collision.
But the place they find themselves in may be even more dangerous - because there they encounter another Doctor, a space pilot named Steven... and a young woman called Katarina who really shouldn’t be there...
Peter Purves (Steven Taylor / The Doctor)
Frazer Hines (Jamie McCrimmon / The Doctor)
Wendy Padbury (Zoe Heriot / Narrator)
Ajjaz Awad (Katarina)
Nicholas Briggs (The Daleks)
Ian Crowe (Chancellor Atrias / Varx / Krell)
Laura Elphinstone (Captain Parlos)
Max Keeble (Piril / Togrok)