Twin sisters hope doctors can perform a radical surgery to separate them. A Spanish woman covered in blisters. A Thai woman has the biggest hand in the world.

In Nepal, four sisters suffer from a mysterious condition that has left them unable to move. A man’s chin won’t stop growing. A Chinese girl born with hair all over her body seeks treatment. A Brazilian girl can’t smile, and conjoined twins find lov

A baby is born with a tumor that takes the form of an extra head. An American man gets a new face.

No arms? No legs? No problem! An American woman’s hair won’t stop growing and an Italian man covered from head to toe in tumors asks the Pope for a blessing.

A rare infection gives a man a leg the size of an elephant. The world’s tallest man can’t stand up. Another man goes into shock at any sudden noises. Werewolf boy lives in Brazil.

A strange tumor is taking over a woman’s body. A girl gets a completely new face. A Chinese woman copes surprisingly well even though her hands and feet are backwards.

A 16-inch-tall Nepalese elder lobbies to get the record for world’s smallest man. They’re proud to be the world’s tallest married couple – but what about their kids?

A Nepalese man is born with three legs. In the US, a woman is covered in bubble-shaped growths. A woman embraces her facial hair. A Brazilian model is possibly the world’s tallest teenager at 6' 8". In Indonesia, conjoined twins undergo risky surgery

Forrest searches for the Formosan Clouded Leopard in Taiwan's jungles.

Forrest searches for a Zanzibar Leopard on this history-making expedition.

Forrest and a specialist in Newfoundland search for the White Wolf.

Forrest searches for the large, furry Pachylemur in the Madagascar jungle.

Forrest combs the Everglades for the supposedly extinct Black Wolf.

Forrest attempts to find the Javan Tiger on the vibrant island of Java.

Forrest heads deep into Australia to find the unique Tasmanian Tiger.

Forrest travels to the Faroe Islands to look for the Great Auk.