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Former bouncer and self-confessed city boy Darren Harriott teams up with adventurous Ria Lina for a trip across South Africa.

In Thailand, Steve comes face to face with the longest venomous snake in the world, the king cobra. Its bite could kill an elephant.

Adventurer Steve Backshall searches for a monitor lizard and goes nose to nose with one as it licks his face, tasting his skin.