Alaska State Troopers returns for a fifth season of rescues, takedowns, arrests, and all-out heroism. With insider access to the force, National Geographic presents a "day-in-the-life" look at the many challenges of the job, capturing a mixture of raw nature and criminal activity throughout Alaska's frigid wilderness, cities and remote villages. Responding by land, air and sea - with backup sometimes days away - they face danger to protect the people and wildlife of Alaska.