But even before its broadcast it caused controversy, with many critics suggesting that it was not respectful to Nazi victims.
"It's a ticket to the past," says the mother, Ivana, who is a primary school teacher in real life. Her husband Miloslav is an ambulance driver.
They applied together for the show but they had no idea until filming began what they were letting themselves in for.
"They didn't know which epoch they were being sent to," says director Zora Cejnkova.
Their two sons, Marek and Kuba, as well as the boy's grandparents, Jarmila and Jiri, and the couple's nephew, Honza, are also taking part.
A traditional documentary would no longer find a wide audience, says Cejnkova.
- DPA