David Attenborough narrates a look at rats, which can run as fast as Linford Christie, leap three metres to escape marauding foxes and walk the high wire to raid a bird table better than any squirrel. We explore the spectrum of rat activity, from the rats' SAS raids on our homes to their devotion to their family. Forget your prejudices and find out why the one small, furry animal we all love to hate is one of the most successful animals on earth, and perhaps in the future, in space too.