From the early 1800's Aboriginal people have been used as guides and trackers by the police force. This century one of the most highly regarded was Sergeant Alexander Riley of Dubbo, NSW.

This three part documentary series explores, with criminals themselves, the perplexing question of why they break the law.

Discover the beauty, brilliance and behaviour of Australia's most conspicuous birds – parrots and cockatoos – in Australia: Land of Parrots.

What does it feel like to lose your mind and can you get it back again?