Jamie and Richard travel to Australia to capture and transport two live sawfish for a breeding programme.
Take a look at these gorgeous animals.
Sumantra's Last Tigers Gallery
Jakub searches for an alligator gar, known for their bony skulls, armour-like scales and piercing teeth.
Meet Dian Fossey, her work and her story of life.
Face to Face
Vágner endures torrential rain and sleep deprivation to catch the mega catfish of the Amazon.
Examining the way a shark approaches a diver may help scientists understand how to avoid shark attacks.
These athletic and wild big cats will struggle to prove who the real King is.
Extreme heat, wind and sandstorms make the journey treacherous and have Vágner struggling to push on.
Images from the heart of the greatest river basin in the world.
Chopper pilot and animal rescuer Matt Wright relocates animals.