Steve Backshall takes to the jungles, skies, seas and forests on a mission to count down the most dangerous creatures on the planet. On his search he encounters some of the best-known predators such as the cheetah, the grizzly bear, the tiger shark and the black mamba snake, but there are plenty of surprises, including net-throwing spiders, an ancient dragon with killer drool, a spear-throwing snail, gigantic killer hornets and even some bloodthirsty plants with killer spines!

Whether they’re the fastest, have the biggest teeth or are the most poisonous – these beasts all have one thing in common: they’re all deadly. But which will be judged the most fearsome and take Steve’s number one spot?