John Varty's attempt to introduce tigers to South Africa depends on his two original tigers mating with two newcomers, Seatao and Shadow.
Bandhavgarh Tiger Reserve sees deadly tiger rivalries played out amid ruins where human dynasties once faced similar struggles.
Only about 500 Siberian tigers are thought to exist in the wild. Without human intervention they may become extinct in our lifetime.
Follow a young tiger in India that has been forced out of its home territory by another male and has to struggle for survival.
Following the efforts of conservationists to find and relocate one of the few remaining wild tigers in an increasingly urbanised Sumatra.