This time on Deadly 60 On a Mission, Steve and the crew head to Mexico's breathtaking Yucatan Peninsula. First up is an exhilarating encounter with one of the most dangerous sharks in the world, the bull shark. Staying on the water Steve embarks on a high-octane chase with the fastest fish in the sea, the sailfish and witnesses these swimming speedsters obliterate a bait ball of sardines right in front of his eyes. Heading inland Steve is awestruck by the stunning spectacle and hunting power of one of the greatest gathering of predators on Earth, a million-strong bat army taking to the night sky. Finally, in a thrilling climax to his trip, Steve ventures alone and in complete darkness into the cave of hanging serpents. Here he marvels at the incredible hunting skills of the Mexican night snake, a cold-blooded predator that can catch a bat in mid-air!