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The UnXplained will tackle subjects that have mystified mankind for centuries, from mysterious structures and cursed ancient cities to extraterrestrial sightings and bizarre rituals. The series will also feature contributions from top scientists, historians, engineers and researchers - each seeking to shed light on how the seemingly impossible can happen.

Bloodaxe is an epic historical drama that chronicles the rise of one of history's most famous Viking warriors, Erik Bloodaxe, and his formidable wife, Gunnhild, Mother of Kings. As they fight for the throne of Norway, the land is torn apart by fierce rivals, shifting loyalties, and bloody betrayals. With war looming and chaos consuming the kingdom, drawing in the ruthless Kings of other Scandinavian countries, and even a powerful English ruler, the stage is set for a thundering, cataclysmic, compelling and utterly magical new Viking Saga.

Fourth Wing follows twenty-year-old Violet Sorrengail as she leaves the life of a Scribe behind at her mother's demand that she become a dragon rider. At the order of her mother, who is a General in the military of Navarre, Violet enters the brutal ranks of Basgiath War College, which trains up-and-coming riders through the Graduate or Die method.

In a world shattered by a devastating cataclysm, a young Earthbender discovers she's the new Avatar after Korra. But in this dangerous era, that title marks her as humanity's destroyer, not its savior. Hunted by both human and spirit enemies, she and her long-lost twin must uncover their mysterious origins and save the Seven Havens before civilization's last strongholds collapse.

The eight-episode fast-paced, nostalgia-fueled series will take viewers on a thrilling ride through America's past.