Doomsday Castle (2013)

Season 1: Episode 7

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.