Heavy Rescue: 401

A semi-truck crush shuts down a crucial border route.

Rookie Sonny faces a 40-car pile-up that turns major highway into a war zone

A vicious storm puts Mark in the middle of a crash zone.

Gary's team fights to upright a battered trailer

Sonny heads to the scene of a violent jackknife.

A whiteout pile-up scatters heavy I-beams across the highway.

Steve cleans up a fuel spill blocking the 400.

Members of the Highway Thru Hell crew join the 401 crew.