Albino orangutan Alba is released back into the wild, and one of the oldest orangutans in the centre is rushed into surgery with a life-threatening condition. Meanwhile, youngsters Beni and Lala finally return to class after an incident that left them with broken limbs, and Dilla unexpectedly gives birth during the night, but the delivery does not go to plan.

A timid orangutan stands up to a bully, sun bears prepare for release, and handlers use a secret trick to keep the orangutans in line: fruit kebabs.

At Nyaru Menteng, orangutans cover survival basics, including nest-building, foraging, and avoiding poisonous snakes.

Wine makes friends with a young macaque; A mother and son from a Thai circus live a new life on a pre-release island.

For weeks, Erik's been battling a head infection. Today he's feeling better and joins the group. At forest school, the students enjoy a poolside classroom where Valentino proves he's more than just a class clown.

Alejandra's view of the world has changed forever, following months of recovery. Can she overcome her new disability and learn to climb again?

Super-smart Tulia and Zalipa go missing from Palas Island, and the race is on to find them before they get into trouble. Meanwhile, everyone is on high alert when a flu virus threatens to sweep through Orangutan Jungle School.

At Jungle School the fate of several graduates hangs in the balance as the staff plans the next round of releases. After nine months, Dilla's moment to give birth arrives but things don't go according to plan and the new family's future is uncertain.

Everyone's on edge as the team makes the final attempt to reunite reluctant mother Dilla with her new baby, Delilah. Clara and Clarita are on their final journey to freedom when a dangerous flood stops them in their tracks and threatens everyone.