Nightmares of Nature

2. The Deep

Many dangers lurk in deep waters such as sharks and piranhas. However even these might not be as big a threat to life as the water itself.

3. In Cold Blood

4. Squirm

5. A Cry in the Dark

Series finale concludes with a look at dangerous animals of the night, including giant centipedes, snakes and the gruesome tale of the most notorious of maneaters, the vampire bat.