Season 10

Keepers are curious when Margery the Malayan tapir is suddenly eating for two; a deadly virus is suspected of being the cause behind a female hyacinth macaw's untimely death, her partner James Bond must undergo total isolation.

Chester Zoo's alpha male lion is having a crisis of confidence. There's been a bloodbath among the vampire crabs. And affable Andean bear Bernie has been kicked out of the family paddock.

Newcomer Safi, a rare bongo antelope from the mountains of Kenya, is giving enthusiastic breeding partner Moti the runaround. Very soon the keepers realise why - it seems she may be about to give birth earlier than expected. Sunda gharial crocodiles Frank and Frankie need to have their blood tested - but taking a sample from one of the world's largest and most dangerous reptiles is easier said than done - and George the giant rat needs to have surgery after an X-ray pinpoints a huge lump of hard faeces in his stomach.

Vila the chimp makes a bid for the job of top female only to get hurt in a fight with rival Alice. And Chester Zoo's super-rare pink pigeons need to stop arguing and start mating.

Young rat snake Sen meets male Jakob, but will they mate or will Jakob eat Sen for dinner?. When Bornean Orangutan Sarkiei becomes sickly, keepers must separate her from prized son Tombol and Rothschild's giraffe Dagmar becomes dangerously thin, keepers must determine whether or not to part her from calf Mburo. The male giant otter pup is struggling to eat and walk.