Many scientists agree that the force of an asteroid has devastated Earth in the past and this programme explores the possibility that it may happen again. Depending on where or how it strikes, human life could be obliterated.
Piers Gibbon and his volunteer patients travel to Hong Kong to try to uncover the secrets and science behind traditional Chinese medicine.
Join British historian William Lindesay on an epic journey along China's national monument, which is said to be over 4,000 miles long.
While serving an 80-year sentence at the notorious Darrington Unit in Texas, Dennis Hope and two accomplices decide to flee after a prison riot.
Go deep inside the international superpower's prison system with unprecedented access from Russia's Department of Justice.
Cameraman Mark Rackley filmed alligators in Florida's Everglades without any protective clothing. T...
Katie talks about how the crew got so close to the whales.
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