2. Sound

Presenters Helen Czerski and Patrick Aryee journey through the world of sound - from the deepest rumbles to the highest squeaks. Using specialised technology, they experience sounds beyond the range of our human hearing. This episode reveals how alligators use low-pitch rumbles to make the water around them dance and shows what it is like to be a bat and to see with sound. Also, Helen and Patrick convert a classic camper van into a giant speaker to conduct the ultimate hearing test for a herd of elephants.

3. Scent

In this episode we explore the powerful world of scent and the animals that have pushed their sense of smell far beyond human abilities. In the Bahamas, Helen dives into shark-infested waters with only a small pouch of liquid as her defence. Patrick controls the behaviour of a swarm of bees using tiny traces of scent, and he gets uncomfortably close to one of the smelliest animals in the world - a skunk!

4. Smell & Taste

5. Superhuman Senses

6. Sixth Sense

7. Sense of Timing

8. Underwater

9. Sky

10. Night

11. Earth

12. Communication

13. The Most Amazing Senses