Deadly 60 presenter Steve Backshall is under the sea with some mighty beasts this evening, and he's absolutely loving it. He's teaming up with behavioural experts, scientists and extreme divers for a brand new series that will see him swimming with some fascinating but deadly animals. First on the agenda are sharks, so he's off to Mexico to learn more about the great white. There aren't many men who'd swim with Jaws without a cage, but that's exactly what Steve is planning to do...