When disaster strikes, Krista's SAR team is trapped, and Tag clings to life on the mountain; Bobby and Mel race to save them.

Krista's SAR crew is pushed to the limit during a high-altitude rescue, while Bobby is the target of an attack in YK.

Bobby blames Bruce Ward for his foster sister's death in a dry community, as Blake and Lindsay pursue a murder suspect.

Bobby and Connor's weekend on the land becomes a fight for survival, while a high altitude flight puts Mel and Krista in peril.

A prisoner transport becomes a life and death struggle for Blake and Lindsay, as Krista and Tag reach an impasse in their relationship.

Bobby and Loreen race to save Caitlin when her first solo flight goes dangerously wrong.

Krista faces a grisly choice when her team attempts a life and death rescue.

Bobby fights to save Petra's life savings when Bruce Ward's involvement in a business deal causes violence and destruction.

A high-stakes plane race raises ghosts from Mel's past, forcing Krista and Tag to confront a crisis in their relationship.

Krista and Tag's relationship is tested when an emergency landing leaves them stranded.

Bobby fights against time and politics to evacuate a community before an upstream dam bursts.

Krista's homecoming is cut short when Arctic Air launches a daring search and rescue operation to save Dev and Astrid.