Three companies fight to keep the power flowing in the remote, frozen Alaskan wilderness. Extreme locations, avalanches and the constant threat electrocution stand in their way.

Alaska Line Builders battle to get their biggest job of the season off the ground, while two of their top lineman battle each other. Electric Power Constructors fears bankruptcy with their Kodiak job and City Electric has an explosive plan for Thompson Pass.

City Electric's Thompson Pass job has come to a sudden halt. Desperate for money Bam Bam sends his crew to a remote tundra town where they encounter a deadly ice road. Electric Power Constructor's efforts on Kodiak Island hits rock bottom.

Sparks fly between a veteran ALB lineman and a newcomer gunning to take control. City Electric's equipment is lost to an icy river and EPC tests a new invention in Kodiak.

All three companies battle for a single job, but only one will win the bid. Meanwhile a Kodiak Bear stalks the EPC crew and one lineman has a terrible accident.

A devastating injury stuns the City Electric crew. Meanwhile ALB navigates an intricate web of live wires to push their job to completion.

With Bam Bam in the hospital, the City Electric team struggles to move on. Ben and Kenny from EPC race snow machines into the night for an emergency job.

ALB races to finish their work in Tuntutuliak, while EPC ends a successful winter with their riskiest job yet. City Electric's Bam Bam tries to make a comeback after his neck injury, but receives shocking news.