In the third episode of the four-part story "Death to the Daleks," the Doctor (Jon Pertwee) is caught between two warring factions on the planet Exxilon. Helped by rebel leader Bellal (Arnold Yarrow), the Doctor and Sarah (Elisabeth Sladen) continue their search for a plague that threatens the entire galaxy. But the dreaded Daleks put a crimp in the Doctor's humanitarian scheme. Written by Terry Nation, "Death to the Daleks, Episode 3" first aired on March 9, 1974. ~ Hal Erickson, Rovi