American POW Col. Robert Hogan (Bob Crane) and his fellow prisoners continue to run a wide-ranging, superbly efficient espionage and sabotage operation right under the noses of their German captors as Hogan's Heroes enters its third season. Although the series "began" in the year 1944, it is apparently still 1944 even after two years on the air, as witness such episodes as "D-Day at Stalag 13," in which Hogan's men stage an elaborate hoax to distract Nazi attention from the Normandy Invasion, and "Two Nazis for the Price of One," wherein the Heroes dispose of a Gestapo agent who has tumbled to the secret of the Manhattan Project. In other developments, General Burkhalter (Leon Askin) steps up his efforts to marry off his Wagnerian sister Gertrude (Kathleen Freeman) to unwilling prison-camp commandant Col. Klink (Werner Klemperer); in "Axis Annie," Hogan and company engineer the downfall of a traitorous female radio personality (Louise Troy); and Ivan Dixon (Sgt. Kinchloe), the series' only African-American regular, is given another chance to display his considerable acting skills in "Is General Hammerschlag Burning?," in which he briefly enjoys a wartime romance with a disillusioned black nightclub singer played by Barbara McNair. While most of the third-season Hogan's Heroes episodes are lightweight comic entertainment, a disturbing note is inserted in the proceedings in "An Evening of Generals," in which Col. Hogan rather cold-bloodedly makes clear that he is willing to kill both Col. Klink and the lovable Sgt. Schultz (Leon Askin) for the greater good of the Allied cause.