|Actors:||Tom Baker, Lalla Ward, George Baker, John Leeson, Barnard Padden|
Attempting to return home to Gallifrey, the Doctor, Romana and K-9 find themselves on the planet Alzarius. As the local inhabitants retreat in terror to their marooned spacecraft, the Doctor sets out to investigate, and a group of young rebels take Romana hostage in the TARDIS. Besieged by the reptilian creatures rising from the marshes, the colonists on the starliner face a bleak future without the Doctor's help. Can he uncover the dark truth about mistfall before it is too late??