1/3 Chris Packham explores the remarkable ways animals use their senses.
3/15 Kate Humble and Ben Fogle try to identify the tortoises in Pets Corner.
1/2 Lucy Cooke finds out how animals communicate in their own social groups.
3/3 Reveals the secret language of cats and why they meow to us but not each other.
2/3 Discover how cats transform from pampered pets to predators.
1/3 Discover how cats see, hear and smell the world with the senses of their wild ancestors.
2/2 Featuring three saltwater crocodiles, two arctic wolves and a shark ray named Boris.
2/2 Newbie the baby three-toed sloth continues the battle with pneumonia.
9/10 A look at monkeys, including Venezuelan red howlers and Costa Rican capuchin monkeys.
8/10 David Attenborough studies tree dwellers, mammals which have adapted to a life at height.