01. Episode 1
Grumpy elephant Thi is expecting a baby. The chimps battle for dominance. Red panda Nima gives her partner Jung the cold shoulder. And the meerkats prove they're not as loveable as they first seem.
02. Episode 2
Inseparable penguins Rud and Spike have been a couple for 15 years. But Rud's arthritic hip could be affecting his quality of life. The tigers move house, and a tarantula risks his life to reproduce.
03. Episode 3
The giraffe family have a new arrival. Frog keeper Pip creates a love den to try to get endangered frogs in the mood to lay eggs. And the aardvarks wreak havoc by night.
04. Episode 4
A potentially deadly virus hits the elephant house. Will Chester's female zebras be interested in new stallion Mac? Plus: the bizarre world of the naked mole rat.
05. Episode 5
Boris the chimp takes a moorhen chick hostage. French crocodile François turns his snout up at British food. The keepers try to spark romance between turtles Raja and Aris. Plus: young penguins.
06. Episode 6
Female rhino Kitani is introduced to her new mate, Magadi. But rhino mating is a risky business. There's a surprise birth in the orangutan house. Plus: fruit bats, macaques and young jaguars.