Doomsday Castle - Season 1 - Eps 7: Escape to the Mountain
Brent Sr. teaches his kids how to rappel off the roof of the castle in case the castle is attacked and they need to quickly escape. Brent II quickly realizes that their enemies could still be on the ground waiting for them and comes up with a solution: a zip line. Brent II and Michael scout out the best path for the zip line, and Lindsey is instructed to help her dad with the roof.
About Doomsday Castle

Title: Doomsday Castle
First Air Date: 2013-08-13
Last Air Date: 2013-10-01
Status: Ended
Rating: 3/10 (from 2 votes)
Language: EN
Seasons: 1
Total Episodes: 8
Network: National Geographic
Genres: Reality, Documentary
Production Companies: Sharp Entertainment
Synopsis
Doomsday Castle is a reality television series on National Geographic Channel, showing the lives of Brenton Bruns and his 10 children preparing for the end of the world, in a castle he has built in South Carolina. Bruns says he built a castle to survive an electromagnetic pulse, since a castle can survive without electricity and defend against marauders. It started as a bunker in 1999, and is continuously being added to. Bruns states that his property is covered with booby traps, and his neighbors are serious preppers with lots of guns. Bruns and his castle was originally featured on the Doomsday Preppers episode No Such Thing as a Fair Fight.