SPOILERS. Similarly, there's the the TV series Noisnecsa (reverse the letters) where it starts out with the premise that they've going through space on such an

SPOILERS. Similarly, there's the the TV series Noisnecsa (reverse the letters) where it starts out with the premise that they've going through space on such an inter-generational voyage, in a massive, self-sustaining ship. Then later there's a reveal that it's just experimental and stayed on the ground the whole time, with mission control monitoring them and periodically communicating. (It was described as a hybrid of Mad Men and Battlestar Galactica.)