Sky History 2 Monday

A team of ancient alien theorists explores the nothon that ghosts and angels could actually be visitors from other-worldly realms

Experts contemplate whether Hawaii's islands may once have been inhabited by extraterrestrials and examine whether its volcanoes could provide a portal between space and time

Bizarre ice formations in the Antarctic Ocean are investigated and a discovery off the east coast of Canada may be connected to a tragic event

Mighty North American twin the B-25, which delivered the first blow in the fight back against Japan, in one of the most daring and audacious raids of all time

Satellite images capture thousands of straight lines, covering thousands of square miles, etched out of the Bolivian desert over thousands of years

A team of ancient alien theorists explores the nothon that ghosts and angels could actually be visitors from other-worldly realms

Experts contemplate whether Hawaii's islands may once have been inhabited by extraterrestrials and examine whether its volcanoes could provide a portal between space and time

Professor Alice Roberts explores historic cataclysmic events to dispel the myths regarding whether man's ancestors believe they were cursed

Dan Jones explores the history of Stirling Castle, which has long been one of the most strategically important castles in Britain and guards the gateway to the Highlands

Examining how oil was obtained from the ground without modern drills, and how a bridge was built across the Rhine in just 10 days

Mighty North American twin the B-25, which delivered the first blow in the fight back against Japan, in one of the most daring and audacious raids of all time

An astronaut hears a mysterious knocking on the outside of his spacecraft, while scientists uncover clues to a devastating super volcano that until now has been undocumented

A visit to an Indian village where men train to become bouncers in the big city. Plus, a tour of the Chinese settlement where fire erupts from the ground

A countdown of the top 10 most interesting reported alien encounters

The exploits of Hans Jochaim-Horn, who stole a tank and smashed through three sets of gates at Schwalmstadt Prison to break-out a friend

Inspired by the story of his two cousins who died at sea in the Second World War, the actor heads to Scapa Flow where he finds treasure that could link to his family

Bizarre ice formations in the Antarctic Ocean are investigated and a discovery off the east coast of Canada may be connected to a tragic event

The Battle of Thermopylae, fought in 480 BC between the Achaemenid Persian Empire under Xerxes I and an alliance of Greek city-states led by Sparta under Leonidas I

A team of ancient alien theorists explores the nothon that ghosts and angels could actually be visitors from other-worldly realms

Experts contemplate whether Hawaii's islands may once have been inhabited by extraterrestrials and examine whether its volcanoes could provide a portal between space and time

Dan Jones explores the history of Stirling Castle, which has long been one of the most strategically important castles in Britain and guards the gateway to the Highlands

A look at how the technology behind the ancient Greeks' Trireme war vessels and Roman emperor Caligula's opulent sex ships has defied reinvention

A countdown of the top 10 most interesting reported alien encounters

An astronaut hears a mysterious knocking on the outside of his spacecraft, while scientists uncover clues to a devastating super volcano that until now has been undocumented

Experts check out structures built to mirror the constellations, contemplating whether they may have been built as a message to send to extraterrestrials