Sunday, 9.30pm, Seven After the Nazi invasion of Latvia, Herbert Cukurs, an officer in that country’s air force and its most celebrated pilot, joined forces with the fascists. He was deemed responsible, with them, for the extermination of 30,000 Latvian Jews. By the mid-1960s this human Dalek was living quietly in Sao Paulo, Brazil — until Nazi hunters chased him down. This debut episode of the Nazi Hunters series moves with the speed of an espionage thriller as it investigates how the Israeli secret service tracked and targeted Cukurs. Could their cunning operative, equipped with a disguise, get close enough to the war criminal to win his confidence and kill him? There are eight episodes of Nazi Hunters in this initial season. They represent a bright lamp of quality burning in a distinctly fallow period for free-toair TV.