Alaska State Troopers - Season 4 - Eps 21: Chopper Down
Wildlife Troopers Ernie Brent and Levi Duell race on snow machines against the time and the freezing temperatures to rescue a missing pilot.; Trooper Johnson is on a mission to catch a snow machine thief.
About Alaska State Troopers

Title: Alaska State Troopers
First Air Date: 2009-10-14
Last Air Date: 2015-04-15
Status: Canceled
Rating: 7.8/10 (from 11 votes)
Language: EN
Seasons: 8
Total Episodes: 90
Network: National Geographic
Genres: Documentary, Crime, Reality
Production Companies: Unknown
Synopsis
They are the first line of defense on the last frontier, the roughly 400 state troopers who patrol the rugged and unforgiving terrain of America’s largest state — Alaska. One of the toughest law enforcement agencies in the nation, these officers often travel hundreds of miles in piercing subzero temperatures to uphold the law. Responding by land, air and sea — with backup sometimes days away — they face danger to protect the people and wildlife of Alaska.