Susan meets Alydon of the Thals and agrees to try and arrange a treaty between his people and the Daleks. But the Daleks only see it as an opportunity to wipe the Thals out.

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