Doomsday Castle - Season 1 Episode 1 Before the Flood

A retired army lieutenant recruits his children to help him finish building his Doomsday Castle, a completely self-sufficient fortress of refuge for the End of Days. The most important tasks are building a drawbridge for the front door, cleaning out the bunker, where the family will be living and fortifying the remaining weaknesses inside of the bunker. The children must work together to complete their father's vision, and be prepared for the Apocalypse.