The Starlost needs a remake. Great premise, dollar store execution.

Foreseeing the destruction of Earth, humanity builds a multi-generational starship called Earthship Ark, 50 miles (80 km) wide and 200 miles (320 km) long. The ship contains dozens of biospheres, each kilometres across and housing people of different cultures. Their goal is to find and seed a new world of a distant star.

In 2385, more than 100 years into the voyage, an unexplained accident occurs, and the ship goes into emergency mode in which each biosphere is sealed off from the others.

Centuries after its original launch, most of the descendants of the original crew and colonists are unaware that they are even aboard a spaceship.