Dead cattle turning up in remote pastures with organs and other body parts removed in cuts so clean they show no blade marks, no blood pooling, and no coyote or vulture damage: that is the core evidence this episode of UFO Files puts on screen. Investigators and ranchers describe carcasses found without footprints or drag marks nearby, and witnesses recount sightings of unmarked black helicopters near the mutilation sites, a detail that has fed decades of government-cover-up theories alongside the extraterrestrial ones. The episode interviews researchers who have spent years cataloging cases and weighs the competing explanations side by side: alien experimentation, secret military testing, and the more mundane possibility that ordinary predators and decomposition can produce wounds that only look surgical. No consensus emerges, and the film says so plainly, presenting the phenomenon as it has stood for decades, undocumented in any conclusive way, then closing on the same open case files the investigators started with. It is a survey of a persistent mystery rather than an attempt to solve it.