Mr Alexander Litvinenko, a Russian living in London, was poisoned by Polonium-210, traced by alpha detectors to a British Airways flight from Moscow to Heathrow. A Champions League match between Arsenal and CKSA Moscow had brought thousands of Russian fans to London. Was one of them responsible for Litvinenko's death?
American MIA in Vietnam
Is it possible that prisoners of war still remain left behind in Vietnam?
Polluted contrails that rain death and disease. Who would commit such a ruthless act?
Marlowe was a rake and a radical, a homosexual and an atheist, but what really happened to this notorious free-thinking Elizabethan in 1593?
Diana, Princess of Wales
Mohamed Al-Fayed, Harrod's owner and the man who might have become Diana's father-in-law, points the finger at Prince Phillip, the Queen's husband, an accusation which sparked a multi-million pound investigation.
Dr David Kelly
The UK scientist and weapons expert found dead just days after being identified as the source who cast doubt on the claim that Saddam Hussein could have fired a weapon of mass destruction at 45 minutes notice. Was it suicide, or murder?
Elvis is supposedly alive and well, and has been spotted countless times since his death in 1977. But Elvis fans inadvertently add to the hysteria by dressing like him - has anyone actually seen the real Elvis Presley?
This 1,000 page document claims that a great deal of suppressed information has played a role in shaping world events since the 1950's. Do the mafia and other corrupt politicians have anything to do with the Kennedy assassinations and other major historical events?
Did campaigner Hilda Murrell suffer a state-sponsored death because she knew too much? Or was this really just an unfortunate end to a botched burglary?
HIV and Aids
Was Human Immunodeficiency Virus deliberately engineered as part of a racist plot to reduce the world's population?
John F. Kennedy
Who was with Lee Harvey Oswald when he supposedly killed the US President?
The ex-president of the US Teamsters Union ate a meal at Machus Red Fox restaurant in Detroit, paid for his meal and walked straight out straight into an American mythology. What happened to Jimmy Hoffa?
It seems clear that John Lennon's assassinator, Mark David Chapman, was simply a deranged fan, or is there some truth to the theory that he was actually a Manchurian Candidate, brainwashed and pre-programmed to kill on command?
Labour union activist Karen Silkwood was allegedly murdered to prevent her blowing the whistle on the Kerr-McGee nuclear company.
Hayer, Butler and Johnson were convicted of first-degree murder, but with all the evidence gathered, is it possible that the FBI set up Malcolm X for assassination by black radicals?
Her death may well have been assumed to have been a suicide if not for her long string of high-profile boyfriends. But if one of them killed her, which one was it?
Hitler's right hand man and head of the Nazi party Chancellery death has continued to cause controversy despite his supposed death in 1945. Bormann is said to have lived on after the war and stayed hidden from view, yet forensic identification documents state otherwise, so why do the conspiracy theories on Bormann persist?
Martin Luther King
To this day millions believe James Earl Ray did not have the capability to execute Martin Luther King alone, but is it true that Ray was merely a patsy?
Supposedly a centre for research into exotic psychological welfare techniques, the Montauk project actually calls into question our whole experience of reality, truth and the universe.
The radical leader of the New Zealand Labour Party had begun a series of attacks on trilateralists, two years later he was found dead, quickly replaced by Wallace Rowling. Are those who think his sudden death from a heart attack just a bit too convenient right to suspect foul play?
Was conspiracy researcher Danny Casolaro silenced to stop his investigation into the theft of PROMIS software?
Robert F Kennedy
Palestinian immigrant Sirhan Sirhan, the man arrested for the assassination of Robert Kennedy, cannot have committed the crime alone. His gun held a mere eight bullets, yet Kennedy was shot eleven times.
The corpse of British publishing tycoon Robert Maxwell was found floating close to his yacht off the Canary Islands on the 5th of November 1991. Many people believe Maxwell's death is dubious, why then, was his family so happy to accept his accidental death?
In 1941 Hitler's Deputy Fuhrer flew a stolen Me110 German fighter plane to Britain on what Hitler affirmed was a mad private 'peace mission', did Hitler approve of Hess's star-crossed plan? Or perhaps he was lured to Britain?
Did Notorious BIG, fellow rap superstar contract the hit on rival Tupac Shakur, or is he alive and well living in Witness Protection?
Wolfgang Amadeus Mozart
Mozart was supposedly killed by his rival composer Antonio Salieri, but not necessarily by cold-blooded physical murder. Some believed Salieri ordered Mozart to work himself to death by anonymously commissioning a requiem mass against an impossible deadline. But why then would his wife allow Salieri to teach their son music?