Spring approaches and the Iditarod sled race heats up in the Season 5 opener. Also: Troopers go head-to-head with a suspicious man at a gas station; and a woman escapes an alleged abuser by running down the highway.

A man who recently escaped from a mental-health facility poses a threat in the Mat-Su Valley; an injured hiker is in need of rescue; hunters take more than their share of resources along Alaska's Inside Passage.

Troopers work through the spring to prevent bear attacks; a man chases campers with a knife; and two troopers track a wanted criminal to a suspicious-looking shed.

An intoxicated man starts trouble with troopers in Butte; arrests are made after a fight in a Fairbanks hotel; an altercation between neighbors involves guns; and brown bears settle into a village dump.

Troopers search for a dead body near an abandoned campsite; a suspicious car crash might be linked to a dangerous perpetrator.

Troopers chase a getaway car containing a stolen firearm; campers are rescued from rivers.

A trooper searches for missing hunters. Also: an off-road chase; Independence Day celebrations.

Two wildlife troopers navigate their patrol boat out of troubled waters before a gale threatens to sink it.

Two troopers find themselves in a showdown with a heavily-armed man who has barricaded himself inside a home. Also: Troopers respond to calls during the dead of winter.

A man beats a car's windshield with his bare hands; troopers respond to an arson call that turns into a knife and Taser fight; a trooper looks for teens who are poaching birds in migration.

A trooper rushes to a fire to save a disabled man.

A high-intensity situation unfolds when shots are fired at the Troopers. In Soldotna, Trooper Hunter Hull and Alaskan police are in a standoff with a man with a shotgun. The standoff escalates when the armed man fires right through the door! In Kenai, Trooper Maggie Stang is on a wildlife patrol near the salmon fisheries when she corners a group of fisherman illegally snagging fish. In Kodiak, a resident calls Troopers when she spots tourists wandering close to a family of brown bears.