This baffling true crime story starts with the grisly death of a pizza man who robs a bank with a bomb around his neck and gets weirder from there.
When a special constable is stabbed to death outside her house, a botched robbery is suspected until police uncover shocking clues closer to home.
Two filmmakers explore an urban legend from their own childhoods: a rash of child abductions that struck Staten Island, N.Y., in the 1970s and 80s.
This documentary dissects the case of a filmmaker whose death, along with the deaths of his wife and daughter, sparked alt-right conspiracy theories.
Follow Todd Standing, Dr. Jeff Meldrum and other researchers into the wilderness, where they try to capture definitive proof of Sasquatch's existence.
This documentary chronicles the true story of a French fashion student who discovered via the Internet an identical twin she never knew existed.
Skeptics and experts discuss photographs and other evidence that suggest the United States government faked NASA's moon landings for political gain.
This intense documentary follows real cases of American girls enslaved in the child sex trade through ads in a newspaper's online classified section.
In this genre-bending tale, Errol Morris explores the mysterious death of a U.S. scientist entangled in a secret Cold War program known as MK-Ultra.
For 13 years, the underground neo-Nazi organization NSU eluded German police while planting bombs, robbing banks and killing immigrants at random.
This documentary series takes us to the mythic landscapes of Europe to explore some of most enduring legends produced by European culture.
How was the scientific understanding of the ancients so advanced? A team of experts answers this and other questions in this fascinating series.
In an attempted heist worthy of a Hollywood film, a cadre of criminals sets out to steal the world's largest perfect diamond from a London landmark.
This film charts Nirvana's Kurt Cobain's rise to fame, his drug-addled romance with Courtney Love and the conspiracy theories surrounding his death.
Skeptics and others discuss widely held conspiracy theories involving aliens, government cover-ups, secret assassinations and other intrigues.
From fingerprint analysts to computer experts to dentists, forensic specialists help authorities track down criminals with the tiniest clues.
This documentary digs deep to recount the saga of the superstar self-help guru convicted of negligent homicide in the deaths of three followers.
From Long Island's Montauk Monster to Mexico's Metepec creature, this special probes the facts and fiction of the world's most mysterious remains.
Declassified FBI documents trace an 11-year investigation of rumors that Hitler survived Germany's defeat in 1945, escaping via U-boat to Argentina.
Determined to bring the man responsible for their daughter's murder to justice, a Southampton couple embarks on a grueling five-year crusade.
In 2000, U.K. detectives spent months tracking a criminal known only as Sally, who was targeting a supermarket chain with extortion and letter bombs.
Wildlife cameraman John Waters travels to the forests of the Pacific Northwest in search of the elusive cryptozoological specimen known as Bigfoot.
Never-before-aired NASA footage presents startling evidence that may finally answer the question: Is the moon a secret landing base for an alien race?
This documentary takes an alternative look at the assassination of President John F. Kennedy by focusing on the secret history of Lee Harvey Oswald.
This spellbinding documentary hosted by actor Jonathan Frakes deigns to go where few have gone before: to Roswell, New Mexico, to investigate so-ca...