Steve travels to Baja Mexico, a land of toxic terrors and ocean giants. First up, the team hop in the saddle and ride horses into the heart of the Mexican desert. Camping out, Steve is hunting for one of the largest snakes in Baja, the red diamond rattlesnake. But they soon discover rattlers aren't the only predators lurking in the desert. Next, Steve and the team head to the Baja coast in search of the largest cold-blooded animal in the world - the whale shark. Its mouth can be over a metre and a half wide, almost big enough to swallow Steve. Finally Steve has a close encounter with a feisty male californian sea lion, who shows him who's the boss.