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Steve Backshall embarks on one of his best ever missions, to the steamy rainforests of Costa Rica, where he sets out to hunt down some of the deadliest animals in Central America.

The mission gets off to a breathtaking start when Steve is almost strangled by a giant boa constrictor, is struck dumb by the strike speed of a viper, and plays hide and seek with a deadly bushmaster.

And as if that wasn't enough, he gets hands-on with the world's most poisonous frog, nearly gets a nip from a blood-sucking vampire and has a dramatic encounter with a huge American crocodile.