Newly declassified files reveal the details of an unexplained encounter between the US Navy and UFOs that seem to defy the laws of physics; using cutting-edge tech, Jeremy Wade investigates the truth behind this alien mystery.

Jeremy Wade investigates if one of the Bermuda Triangle's most infamous disappearances was part of a conspiracy by a secret agent at war with the United States, and using technology, experts reveal if it vanished for far stranger reasons.

Jeremy Wade reveals the new deep-sea discoveries that might prove the existence of the infamous giant squid.

When a mummy is discovered on an abandoned boat, investigators struggle to explain where it came from; Jeremy Wade reveals what happened and the strange forces to blame for this mysterious phenomenon on the high seas.

Using state-of-the-art science, Jeremy Wade chases new leads in pursuit of the Loch Ness monster's hiding place.

Jeremy Wade investigates the whereabouts of a lost relic of the Space Age that tarnished the reputation of NASA's first astronauts; cutting-edge technology turns up brand-new evidence that might finally vindicate this American hero.

Jeremy Wade reveals details of a high-speed chase between a narco sub and the US Coast Guard; with the help of declassified files and cutting-edge military technology, experts investigate if they've found Pablo Escobar's lost treasure.

A sunken Nazi submarine packed with toxic cargo is a ticking time bomb that could put the whole world at risk; Jeremy Wade reveals the sub's top-secret mission it was on when it sank and how experts keep it from sparking a global catastrophe.

Jeremy Wade explores how fresh insights into ancient boat building techniques shed new light on the truth behind the biblical story of Noah's flood.

Mysterious reports of boiling seas might be evidence of a deadly undersea volcano in the Bermuda Triangle with a long list of victims; Jeremy Wade investigates the newest discoveries from this strange stretch of water.

Jeremy Wade investigates a ticking time bomb in the form of a sunken Nazi submarine, and he unravels one of the Bermuda Triangle's most infamous, secret-agent-related disappearances.

Jeremy Wade is not a fisherman; he's an "extreme angler" in search of the biggest and most dangerous freshwater fish, the kind with a taste for human flesh. This action-adventure series also features Wade illustrating how these river monsters are constructed to kill.

There appears to be dramatic evidence that some of the world's most iconic rivers are in declining health. Biologist, extreme angler and Animal Planet favorite Jeremy Wade ("River Monsters") investigates the disappearance of freshwater giants from the planet's largest waterways. He talks with people who live along the Amazon, the Ganges, the Yangtze, the Mississippi, the Danube and the Zambezi to understand how exploitation and pollution have degraded these rivers that were once home to his beloved monster fish. By gathering evidence, Jeremy learns about the rivers' health and sustainability and what is being done to save them.

Extreme angler Jeremy Wade goes in search of the biggest and most dangerous fish.

Before heading off on his next journey, Jeremy Wade counts down the biggest catches in "River Monsters" history.

Popular Animal Planet personality Jeremy Wade, the nine-season star of the network's top-rated series "River Monsters," returns to waterways across the globe to investigate reports of the unimaginable and unexplained. He takes viewers on journeys beneath the water to remote areas, to islands lost in time and out into the open ocean to investigate reports that include entire fish species suddenly disappearing; unexplained sightings of mythical beasts; once thriving rivers now empty; and genetic oddities that may have produced the biggest monsters yet.

Eagle-eyed technical experts prove there is no such thing as a perfect crime as they assemble the pieces every criminal leaves behind. Dramatic crime re-creations and, sometimes, part of the investigations are a staple of the series. Some of the re-creations include alternate versions of the crimes, which are disproved by science. The show's episodes follow each case from the initial investigation until it reaches its legal resolution.

Crimes and mysteries are investigated.

"Dateline," NBC's long-running newsmagazine series, brings its cutting-edge, heavy-hitting journalism style to Investigation Discovery, bringing viewers harrowing crime stories and tackling topics of broader importance to society. Hosted by either Lester Holt or Keith Morrison, the repackaged episodes go behind the headlines to introduce the detectives, the suspects, the victims, and the families involved in a devastating criminal investigation. Emotions play out in a courtroom, where dark secrets are laid bare until a verdict is revealed.

You're familiar with their names and many of their stories, but there's more to most historical figures than what's in the basic textbooks. "Mystery Files" has modern historians, scientists and scholars investigate ancient artifacts, documents and locations in search of answers to age-old questions about history. Episodes look for proof that explorer Marco Polo existed, an explanation for how Joan of Arc overcame hardships to become a legendary saint, details about Abraham Lincoln's dark past, and an end to the debate about English soldier T.E. Lawrence, the inspiration for the film "Lawrence of Arabia."