Doomsday Castle (2013)

S1E7 Escape to the Mountain

Brent Sr. shows his children how to rappel down from the castle roof in case of an attack that requires a swift getaway. However, Brent II soon realizes that their foes might be lurking below. He proposes a clever alternative: a zip line. Together with Michael, Brent II explores potential routes for the zip line, while Lindsey is assigned to assist her father with preparations on the roof.