Amazon Abyss - Season 1 Episode 2 -

The team faces its greatest challenge yet - exploring the 90-metre-deep trench of the legendary Rio Negro. Using an underwater robot to examine the depths proves trickier than anticipated when a storm brews, and as the machine struggles, Mike deGruy heads for the jungle in search of the three-toed sloth. He eventually ventures into the water - only to come face to face with a predatory fish determined to make him its next meal.