"Mystic Knights of Tir Na Nog" is a children's television series that aired in the late 1990s. The show is set in the mythical land of Tir Na Nog, where three young warriors—Rohan, Deirdre, and Kieran—are chosen to protect their kingdom from evil forces. They are granted magical powers and armor to help them in their quest. The series combines elements of fantasy and adventure, featuring various mythical creatures and challenges. Each episode follows the knights as they battle the dark sorceress Morrigan and her minions, showcasing themes of bravery, friendship, and teamwork.