Episode Information

Dan O’Neill takes viewers on a journey into the shadowy, gruesome world of animal invaders, exposing the shocking ways some creatures exploit others to survive.

From parasites that manipulate hosts’ behavior to viruses and fungi that hijack bodies, the natural world is full of relentless and cunning predators operating unseen. O’Neill reveals astonishing examples of this hidden horror: a louse that replaces a fish’s tongue, parasites that infest the eyestalks of amber snails, and fungi that take control of the brains and bodies of bullet ants.

With scientific insight and vivid storytelling, he uncovers the ingenious, terrifying strategies animals use to survive at the expense of others. This exploration of nature’s darker side challenges our perceptions of life, survival, and the macabre interconnections that drive the natural world.

Available from April 2026.