Safety is a theme in this episode, as the experts come down hard on participants for their sloppy (and dangerous) work habits. Challenge One is a teardown: demolishing a wall to make room for bunk beds. It’s a test of patience and planning, but at times it seems more like handymen gone wild. Challenge Two is building a picnic area — complete with gazebo, table and barbecue. But a gross misuse of tools throws a wrench into the entire project. Challenge Three gives the teams a chance to redeem themselves: building a boat lift.