In the conclusion of the four-part story "The Savages," the laboratory used to sap the strength and intelligence from the Savages is finally destroyed. But there are more surprises in store for the Doctor (William Hartnell) when the enigmatic Exorce (Geoffrey Frederick) reveals his loyalties in the conflict between the Savages and their "civilized" oppressors. Peter Purves makes his final series appearance as Steven Taylor, exiting in a spectacularly noble and selfless fashion. First telecast June 18, 1966, "The Savages, Episode 4" was written by Stuart Black; this episode apparently no longer exists. ~ Hal Erickson, Rovi