PRAGUE — We have seen toddlers in tiaras, been left “Naked and Afraid” and met more real housewives than a postman.

But if you thought reality television had reached the boundaries of imagination and good taste, a show that went on the air in the Czech Republic this month has opened up a whole new frontier.

In “Holiday in the Protectorate,” an eight-part series from Czech public television, three generations of a real-life family are sent “back in time” to a remote mountain farm in 1939, when German invaders transformed the country into the Protectorate of Bohemia and Moravia.

There, they must not only survive the rigors of rustic life with dated appliances and outdoor plumbing, but navigate the moral and physical dangers of life under Nazi rule.