Kal accuses Za of Old Mother's murder but the Doctor exposes him as the real killer.However, Za then insists the travellers be held prisoner until they show him how to make fire.

Starring:

Elisabeth Sladen, Frazer Hines, Jacqueline Hill, John Levene, John Scott Martin, Jon Pertwee, Katy Manning, Nicholas Courtney, Pat Gorman, Patrick Troughton, Peter Davison, Tom Baker, William Hartnell, William Russell

Genre:

Adventure, Drama, Sci-Fi