Doomsday Preppers - Season 3 Episode 6 The Fight Ahead

Prepper Chad believes that a nuclear strike resulting in a genocidal siege is a real possibility. At his home in Arizona, he is working on executing the biggest prep of his life — a 140-foot-long escape tunnel from his family's house to a bug-out vehicle. With the help of his wife and daughter, he begins construction — but as the project unfolds, they realize they're in over their heads.