History"s Greatest Mysteries Show Summary, Upcoming Episodes and TV Guide

A series of unexplained deaths near Chicago in 1982 starts a nationwide panic; the victims are connected by one frightening detail: cyanide-tainted capsules of Extra-Strength Tylenol; 40 years later, it remains an active FBI investigation.

A spree of gruesome murders shocks Victorian England--and the world. The homicidal maniac responsible remains a mystery. Can history's most notorious serial killer ever be identified? Who is Jack the Ripper?

A cold case that ignites every parent's worst fears: on Christmas morning, 1945, five siblings vanish from their family home in West Virginia during a raging fire. The devastated Sodder family spends the rest of their lives trying to find out what happened. Despite the work of dozens of investigators and thousands of amateur sleuths, the mystery remains: what happened to the Sodder children?

It's a treasure coveted by everyone from Roman Emperors to Adolf Hitler--a sacred object said to hold incredible powers of healing, resurrection and immortality. It may be the world's most sought-after relic, but what is the Holy Grail? And if it exists, can it ever be found?

As the Cold War ramps up, a well-dressed man is found dead within miles of a nuclear testing site on a tranquil Australian beach. There are no clues to his identity, or what could have happened. It's a case that's obsessed an army of sleuths for over 70 years: Who is the Somerton Beach man, and how did he die?

A powerful union activist disappears from a Detroit suburb. 45 years later, it remains one of the most notorious missing person cases of all time. The mystery of Jimmy Hoffa's disappearance features more twists and turns than a Hollywood movie, but the question remains: where is he?

Harry Houdini left behind a diary that had been kept from the public, held under lock and key by a wealthy New York City Family. Now, magician and Houdini expert Bill Kalush has finally secured access to these pages. A team of experts will begin to unveil the diary, using new information gleaned from these personal accounts to form new insights into this enigmatic man's life. But Houdini's humble rise to fame eventually turns into a dark web of mysteries shrouding the truth behind this legend's end. From vindictive competitors to a man driven to failure by his own ambitions, the cause of Houdini's sudden death has remained unsolved, until now.

An investigation into the unshakable claims of Roger Miklos, one of America's most eccentric, controversial, and accomplished treasure hunters. Decades before his death in 2018, Roger believed he discovered a modified Nazi U-boat loaded with a fortune in artwork, antiquities, and gold off the coast of Turks and Caicos. Before he passed, Roger gave an exclusive interview that revealed clues about the possible position of the U-boat and left behind a trove of documents, maps, and photographs. Now, armed with this evidence, celebrated diver Mike Fletcher and his team will take to the high seas in search of the special U-boat.

Investigator Ben Smith travels to Jesse Marcel's hometown on Louisiana's Gulf Coast to speak with family members who reveal information that supports Marcel's story of a government coverup. Smith speaks with Leslie Kean, the investigative journalist who broke The New York Times story about a clandestine U.S. government program to investigate UFOs. Smith also digs deeper into the mystery of the journal as he studies writing samples to determine if the journal might have been written by one of Marcel's fellow officers who later claimed he was ordered to oversee the military's coverup. Back in Marcel's hometown, Smith meets with a man who swears Marcel confided in him about alien bodies-- something Marcel had never mentioned to the press or family. As the results come back from soil, metal and forensic handwriting analysis, Smith shares his findings with the Marcel grandchildren.

The series follows the grandchildren of Major Jesse Marcel, the first person to investigate the wreckage. The investigation is being led by Ben Smith, a former CIA operative. The family believes Major Marcel was forced by the U.S. government to deny he ever saw a UFO. The family possesses a diary found in the belongings of Major Marcel, which may contain coded clues to the truth of what happened at Roswell. The investigation follows a compelling trail of evidence that leads from the Roswell crash site to new revelations that key U.S. Army officers believed it was truly a UFO incident. We will also attempt to decode the diary for the first time.

In 1914, Sir Ernest Shackleton led an expedition to Antarctica but soon after arrival, Shackleton's ship - The Endurance - was destroyed by shifting glaciers, and he was tasked with leading his 27 men across the tundra, on an epic struggle for survival. Shackleton's battle against the odds and his unfailing commitment to bring all his men out alive turned him into a legend that still inspires today. The Endurance is as illustrious as the Titanic, yet it has remained lost for over a hundred years. Its final resting ground remains as one of the greatest polar mysteries. Now, the HISTORY(R) channel follows a new ground-breaking expedition heading back into the frozen seas to hunt down the last piece of the story: Shackleton's lost ship. Led by maritime archeologist and shipwreck expert, Mensun Bound, this expedition is the result of two years of planning and over $250 million spent in cutting edge technology as they set out to break through the ice and locate this holy grail of shipwrecks.

With over 7,500 hours investigating the D.B. Cooper mystery including analyzing evidence, interviewing witnesses, reading 20,000+ pages of FBI case files and exploring important locations, top D.B. Cooper expert, Eric Ulis, believes that he's found the true location where Cooper landed during his daring dive. Ulis has also assembled a team of specialists to explore the untouched Washington backcountry, federally restricted (wildlife refuge) land, to hunt for the missing evidence Cooper left behind. In addition, armed with new leads regarding the identity of Cooper, Eric works closely with a retired FBI agent as they set their sights on a living person of interest who could very well be the infamous D.B. Cooper as they attempt to solve the only unsolved skyjacking in United States history.