Season 1

The loyal followers of feudal ruler Asano Naganori avenge his ritual suicide in early 18th-century Japan.

An elite special forces corps in ancient Germany appears out of the darkness to frighten their enemies.

Viking long ships roll up to Lindisfarne in 793 and launch a brutal attack on the island's monastery that forever impacts England's history.

Hawaiian Koa were elite warriors in a land dominated by war. They were grand masters of a martial art called Lua- a way to break every bone in an enemy's body. When Captain Cook lands on Hawaii, the Koa warriors greet him in the worst way.

In 1562, a young warlord, called Tokugaway Leyasu hires a specialist called Hattori Hanzo to help him free his daughters who are being held hostage in a castle. Through a hard journey, they end up inaugurating a golden era for Japan and the Ninja.

Conflict between Shiite and Sunni Muslims tears away at 11th-century Persia when Ismailian Hassan-i Sabbah founds the Assassins.

Spartan youth learn to withstand pain and survive the harshest conditions, a training technique that comes in quite handy during the Battle of Thermopylae.

The elite units of the Byzantine Army, the Varangian Guard, served as personal bodyguards to the Byzantine Emperors, and originated primarily from Scandinavia and England. Along with the prowess in combat they wielded highly effective weapons.

Eagle Warriors serve as the elite troops of the Aztec Empire, being trained not to kill, but to capture enemies; "La Noche Triste" tests the warriors' strength.

During the Roman occupation of the Holy Land in the first century, the Sicarii serve as hitmen, working toward the liberation of Judea and the unification of the country.