Episode 2. Dr Chris and Dr Xand find out about brainy birds. Chris Packham visits a safe-cracking parrot, a watch-stealing cockatoo and even some time-travelling birds. [S]
Episode 10. Dr Chris and Dr Xand find out all about sharks. Chris Packham discovers magnetic sharks and also attempts a terrifying experiment with some reef sharks at the bottom of the ocean. [S]
Episode 9. Dr Chris and Dr Xand find out all about dolphins. Chris Packham discovers a dolphin that can see without using its eyes and dolphins that like to hold hands. [S]
Episode 8. Dr Chris and Dr Xand find out what cats get up to when humans are not around. They find out how cats communicate with each other and catch some real live cat burglars. [S]
Episode 1. Dr Chris and Dr Xand find out what cats get up to when humans are not around. They go undercover to follow cats who have GPS systems fitted. [S]
Episode 1. Dr Chris and Dr Xand find out the differences between dogs and wolves. Chris Packham visits some perfume-loving wolves and watches some tiny wolf cubs. [S]
Episode 5. Dr Chris and Dr Xand find out how dogs use their senses. Chris Packham visits an incredible sniffer dog who can find things underwater and a dog that can tell the time. [S]
Episode 4. Dr Chris and Dr Xand find out about animals with human-like behaviours. Chris Packham visits chimps that tell lies, elephants that get upset and dolphins that ask for help. [S]
Episode 3. Dr Chris and Dr Xand find out about animals with human-like behaviours. Chris Packham visits elephants that talk to each other and dolphins that sing to one another. [S]
Episode 2. Dr Chris and Dr Xand find out about brainy birds. Chris Packham visits a safe-cracking parrot, a watch-stealing cockatoo and even some time-travelling birds. [S]
Episode 9. Dr Chris and Dr Xand learn about space. They discover that the Earth has an invisible force field that protects it from deadly solar winds. [S]
Episode 8. Dr Chris and Dr Xand learn about space. They find out all about the angle of the Earth's spin and how it affects lots of things, including the four seasons. [S]
Episode 3. Dr Chris and Dr Xand learn about space. They find out all about the length of our days and how they are getting longer - and that it's all because of the moon. [S]