Steve Backshall explores the world of insects and their close relatives, the arachnids and crustaceans, in order to find out more about their habits and secrets.

Ch1. Them and Us
Steve Backshall explores the connections and relationships humans have with insects and their close relatives, the arachnids and crustaceans. He begins by revealing how huge armies of driver ants give houses a five-star clean-up in Kenya, while in China, silkworm caterpillars are credited with shaping culture and distribution. He also explains that, despite people's perceptions of these creepy-crawlies, mankind could not live without them.

Ch2. Making Worlds
Steve Backshall explores the influence that insects and their close relatives, the arachnids and crustaceans, have on the planet's many ecosystems. He reveals how the landscape of South America's grasslands has been created almost solely by one team of bugs - grass-cutter ants - while in east Africa, the savannah would quickly become swamped in dung were it not for the activities of a particular beetle. He also contemplates the idea that without one tiny creature, the blue whale could not exist.

Ch3. The Secrets to Their Success
Steve Backshall explores why an estimated 10 million species of insects are so abundant, and examines the secrets of their success. In Yellowstone National Park, he reveals how teamwork enables a colony of bees to scare off a hungry bear, and he travels to the Swiss Alps to highlight the relationship between ants, wasps and butterflies.