Plot: Steve Backshall is back with another countdown of the most dangerous animals in the world, picking out his personal top ten and revealing incredible facts and amazing new creatures never seen on Deadly 60 before! From Extreme Assassins to Deadly Defenders, whether they're survival experts, attack in giant armies or are the most poisonous - these beasts all have one thing in common: they're all deadly. But can you guess which extraordinary animal will be crowned number one?