Sky History 2 Monday

Theorists delve into the stories of people who claim to have mingled with extraterrestrial beings while they were on the brink of death

An investigation into whether Earth's deepest caves could contain secret conduits to other worlds, or harbour evidence that aliens once visited the planet

The River Hunters head to the River Lochy in search for evidence of the clashing Scottish clans embroiled in the 17th-century civil war

Andy McGrath makes a startling discovery at the site of the Rendlesham UFO Incident and has an amusing encounter whilst investigating Suffolk's demon dog Black Shuck

The team compares the strange encounters of two men, one from Ohio and the other from Virginia, to see if there is evidence that they have had contact with extraterrestrials

The legendary Ohio Grassman is apparently captured in footage of a tall, dark-coloured, hairy creature walking through woods