It seems incredible, but the evidence is overwhelming: Sgt. Carter has turned against Hogan and gone over to the German side. But fear not, Hogan's Heroes fans: Carter's defection is but a ruse, which will (hopefully) enable him to ferret out the location of a top-secret German chemical factory. Antoinette Bower makes the first of two third-season appearances, here cast as Leni Richter. Written by Richard M. Powell, "Carter Turns Traitor" first aired on December 23, 1967. ~ Hal Erickson, Rovi