Arthur C. Clarke's Mysterious Universe
Season 1, Episode 7: Keys to the Past
Select Source
The mystery of giant stone jars discovered on an Indo-Chinese plain
All Episodes - Season 1
Episode 1
Snake Charmers, Wolf Children and Holy Men
Episode 2
On the Trail of the Big Cats
Episode 3
Where Giants Walked
Episode 4
Relics of the Saints
Episode 5
Mysteries of the Sea
Episode 6
The Psychic Detectives
Episode 7
Keys to the Past
Episode 8
The Burning Question
Episode 9
A Crop of Circles
Episode 10
At Death's Door
Episode 11
Callers from the Cosmos
Episode 12
The Evil Eye
Episode 13
Secrets of the Pyramids
Episode 14
Mysteries of the Maya
Episode 15
Squaring the Bermuda Triangle
Episode 16
Doom of the Dinosaurs
Episode 17
Cracking Codes: Writings, Runes and Other Riddles
Episode 18
Zombies, The Living Dead?
Episode 19
The Strange Powers of Animals
Episode 20
Into Thin Air
Episode 21
Baffling Bombardments
Episode 22
Meeting Mary: Visions Of The Virgin
Episode 23
Secrets Of Ancient Worlds
Episode 24
Spirits Of Place: Hauntings & Spectres
Episode 25
True Or False: More Than Meets The Eye?
Episode 26
Mysteries Of The North