The One Zoo Three brothers join big-cat keeper Briony at the cat sanctuary, where all the animals are limbering up for a very special day of sport. Rare amur leopard Xizi tackles a specially prepared assault course, while snow leopard Khumbhu is put through his paces as he begins training for a marathon move. Meanwhile, Jua the cerval baffles the brothers with her aerial acrobatics in the high jump, and Yazi the puma sinks her teeth into a game of basketball. Cam puts his foot in it while cleaning out Aquarius the fishing cat's stinky diving pool, and Tyler puts his super-sensitive sniff to the test as he tries to guess Whose Poo? And the boys look back on their African adventure, where they help a conservation project in Kenya track down lions and help protect them in the wild.

It's a busy day at the One Zoo Three zoo as Cam, Tyler and Aaron get stuck into lots of important odd jobs. Scally the African spotted eagle owl's home gets a new makeover, and the brothers make a bit of a splash refreshing the penguins' pool. The otters are cooling down thanks to a clever recycled shower, and Aaron springs into action at the duck pond to help clean the water fountain. The brothers remember their travels to Uganda, helping conservation projects caring for endangered rhinos, giraffes and lions. And who will the meerkats decide is Disaster Chef when they tuck into Cam and Aaron's homemade pizza and donuts?