Alaska

Sean and Jessie decided to search for their father because the police response was too slow. After Jake's plane crashed near Devils Thumb, the official rescue effort was not moving quickly enough to suit the siblings. Their determination to save their father, combined with their knowledge of the wilderness from their time in Alaska, drove them to take matters into their own hands despite the dangerous odds.

Perry and Koontz intended to sell the polar bear cub alive to a client in Hong Kong for a fortune. This black market value made capturing the cub more profitable than killing it immediately. Koontz argued they should kill the cub instead, but Perry insisted on keeping it alive for the sale.

The poachers' initial stakeout of the bear family already reveals their intent to capture the cub for profit.

Cubby used his natural polar bear instincts to navigate through the Alaskan wilderness toward Devils Thumb, where Jake's plane had crashed. The cub's survival instincts and familiarity with the terrain helped guide the siblings through the harsh landscape to the crash site, ultimately leading them directly to their father.

Cubby's earlier behavior of following and trusting the children establishes the bond that enables him to guide them later.

The siblings survived by combining their kayaks for water travel, seeking shelter in an old rusty cabin, using a canoe along rivers, and receiving help from Chip and his grandfather Ben. Their resilience, outdoor skills, and the crucial assistance from their new allies allowed them to navigate the dangerous terrain and weather conditions.

Earlier scenes showing Jessie and Chip observing wildlife from their kayaks demonstrate their comfort and familiarity with the Alaskan waters.

After the chaotic helicopter confrontation where Cubby fought back and knocked out the controls, Perry and Koontz were left stranded on foot in the wilderness, separated from their helicopter and their prize. They were forced to trek through the harsh Alaskan terrain without transportation, effectively ending their pursuit.

The tranquilizer dart that hit Koontz during the struggle disabled the helicopter controls, creating the circumstances for their downfall.

After finding the crash site, Sean used a flare to signal for help. Jessie then lowered Sean on a rope to reach Jake, who was injured but alive. Cubby assisted by pulling the rope, helping bring Jake and Sean back to safety. Charlie arrived by helicopter to complete the rescue and bring the family to safety.

Jake's earlier action of signaling with a flare explains how the children located the crash site in the first place.

Perry and Koontz used their helicopter to ambush Sean, Jessie, and their allies because they needed to recapture Cubby after he escaped. The helicopter allowed them to track and corner the group in the wilderness near Devils Thumb. They tranquilized Cubby and loaded him aboard, though the attempt ultimately failed when Cubby awakened and fought back.

The poachers' earlier realization that Cubby had escaped from their camp explains why they were so desperate to reclaim him.

Jake's plane crashed because its engines stalled during an emergency run to Douglas. The engines lost power while flying over the remote mountainous area near Devils Thumb, causing the plane to lose control and crash in a remote wilderness location.

Perry and Koontz deceived helicopter pilot Charlie by hiding the kids' kayak and planting a fake clue, a broken piece of an oar, to make it appear the children had gone in the wrong direction. This misdirection caused Charlie to search the wrong area, buying time for the poachers to continue their pursuit.

The earlier scene where Charlie arrives to help locate the children establishes his role in the rescue effort.

Cubby helped rescue Sean and Jessie because of the bond formed when they freed him from the poachers' cage and cared for him during their journey. The cub viewed them as his protectors and family after they saved his life. His gratitude and trust drove him to assist them in rescuing their father, even pulling the rope to help bring Jake to safety.

The moment when Jessie and Sean release Cubby from the cage establishes the emotional connection that makes his later help believable.

Jake Barnes moved his children Sean and Jessie to Alaska to start fresh after their mother's death. He took a job flying cargo planes for Quincy Air Service to support them. However, the move was difficult for Sean, who was struggling with anger about losing his mother and being uprooted from his previous life.

Sean's early conversation with Jake about the move establishes his emotional struggle and the family's recent loss.

At the end of the movie, the Barnes family returned Cubby to the wild Alaskan wilderness. Cubby was reunited with a new polar bear family, allowing him to live freely in his natural habitat. The family watched with relief as Cubby headed off to join his new family, giving them a sense of closure and hope.