Upcoming episodes, programme details and where to watch over the next seven days. All times are UK time.
Stargate Portals: Discover doorways to wormholes in time, their secret locations around the world, as well as who is trying to open them and why.
Remote Viewing: Documents may prove that the government has a secret group of remote viewers watching its citizens: the CIA's 'psy ops army'.
America's Alien Wars: Has the US government and military been at war with alien aggressors for the past half-century and kept it from the public?
Time Travel: One of the universe's most enduring mysteries is time travel. Discover why time travel is unavoidable in Einstein's world of relativity.