S3 E1 • Londres, les enfers du royaume

The third-season opener explores Victorian-era London, when hard times forced many to take extreme measures to procure food and shelter.

Première diffusion : 26 octobre 2008

S3 E2 • Okinawa, les tunnels de l'enfer

Exploring the Japanese island of Okinawa and its complex system of subterranean tunnels, caves and bunkers that was used during World War II.

Première diffusion : 2 novembre 2008

S3 E3 • Sicile, les souterrains de la mafia

Underground Sicily and the origins of the Mafia are explored. Included: the escape route of a mob boss; a bone crypt; and bunkers used during World War II by the Axis powers.

Première diffusion : 9 novembre 2008

S3 E4 • Las Vegas, l'envers du décor

Underground Las Vegas is explored. Included: secret surveillance centers for casinos; underground vaults; and tunnels used during the Prohibition era.

Première diffusion : 16 novembre 2008

S3 E5 • Belgique, dans les tranchées avec Hitler

Underground Belgium is explored, focusing on the trenches and tunnels of World War I.

Première diffusion : 23 novembre 2008

S3 E6 • Europe, l'âge des ténèbres

Exploring life beneath the streets in Europe after the fall of the Roman Empire.

Première diffusion : 1 décembre 2008

S3 E7 • Los Angeles, le territoire de la peur

Underground Los Angeles is explored. Included: Charles Manson's subterranean hideaways; tunnels used by corrupt cops; the subway system; and military bunkers.

Première diffusion : 7 décembre 2008

S3 E8 • Rome antique, l'ère des gladiateurs

Ancient Rome is explored, focusing on places associated with gladiators, including the Colosseum, brothels and crypts. Also: a school where gladiators learned how to fight and survive.

Première diffusion : 15 décembre 2008

S3 E9 • Éthiopie, la terre sainte enfouie

Underground Ethiopia is explored. Included: tombs of emperors; subterranean cathedrals; and the palace of the Queen of Sheba. Also: theories regarding the possible resting place of the Ark of the Covenant.

Première diffusion : 22 décembre 2008

S3 E10 • San Francisco, les dessous d'Alcatraz

Underground San Francisco is explored. Included: an ammunitions depot; a former repository for nuclear missiles; Civil War fortifications beneath Alcatraz; and tunnels below Chinatown.

Première diffusion : 12 janvier 2009

S3 E11 • Egypte, les souterrains millénaires

Underground Cairo is explored, focusing on ancient structures that have withstood time and countless invasions. Included: a step pyramid built a century before the Giza pyramids; and a tomb containing 2000-year-old mummies. Also examined: the Book of the Dead.

Première diffusion : 26 janvier 2009

S3 E12 • Turquie, dans les entrailles des cités d'or

Underground Turkey is explored, focusing on the remnants from invasions and travelers on the trade routes. Included: the lore of the Trojan War.

Première diffusion : 2 février 2009

S3 E13 • Sydney, le bagne du bout du monde

Underground Sydney is explored. Included: a 19th-century prison; caves that were once home to fugitive outlaws; gold mines. Also: a secret World War II storage place for chemical weapons is toured by those who once worked there.

Première diffusion : 9 février 2009