They say the best relationships start off as friendships, and Henry tests this out as he tries to romance his best friend Barbara. Meanwhile, the sanctuary's old timers develop a strange new obsession. In Sara Soda's forest, Carlee reaches new heights in her quest to become an independent chimp as the mystery of her paternity is finally revealed.

Jimmy Dean and Mason's battle to be the dominant male in their group reaches a tipping point, while elsewhere in the forest, Carlee joins a nighttime quest to solve a mystery. Alpha Spock is confronted by a rebellious lieutenant, Shaq. Will the laid-back leader find a way to return peace to his group?

Aspiring alphas Jimmy Dean and Mason go head to head in a battle for dominance in Sara Soda's forest. Over at Slim's place, Rebellious Riley faces a special challenge that produces an unexpected result. Meanwhile, a jealous Henry threatens to turn the Oddballs' moving day to chaos – but will boss Donovan let the upstart ruin everything?

As Nina celebrates a special birthday, her mischievous son Riley threatens to wreck the party. Alpha Sparky and his family prepare to move into a larger community, but only if he can overcome a debilitating injury. In Sara Soda's family, Carlee's big sister Arden tries to force her way up the political ladder – but has she pushed too far?

In Sara Soda's forest, Jimmy Dean and Mason confront a rival group, but they'll need reinforcements if they want to stand a chance. Riley's reign over his group's new home is threatened by the arrival of the real boss, Slim. Midge's integration into his forever family is thrown into doubt, as troublemaker Twyla turns the group against him, perhaps permanently...

Two-year-old Carlee quickly learns that being cute will only get you so far in the family. Meanwhile, boisterous Riley pushes his group's patience to the brink with his constant hijinks, and the veterinary staff race to move the rest of Slim's group to a new state-of-the-art corral. A newcomer Midge arrives in search of a new family and a forever home, but will he make new friends?