"Let the challenge begin!"

Raven

Raven, an ancient and immortal Scottish warlord, guides his young charges - warriors - in a grueling set of challenges to discover who will triumph and emerge as the Ultimate Warrior. (Note: the episode titles for each series always follows the episode titles found on YouTube to the corresponding series and episodes. Some are titled after the only available videos of the episode and others are titled after the best quality video of the episode).