Part 4/4. Join the National Geographic cameras in their on-hand account of a team of Russian and American scientists racing to protect the endangered Siberian Tiger. The biggest cat on earth, there are only 300 Siberian tigers surviving in the wild today. Tigers of the Snow depicts some truly exciting and highly dangerous tiger conservation efforts: wildlife biologists risking their lives to rush into a tiger den to tag a two-month-old cub before its mother returns and even giving mouth to mouth resuscitation to an ailing sedated Tiger. This video adventure is fast moving and full of exciting, bold efforts to help save the remaining Tigers of the Snow in Siberia.