King Randor's Chief Advisor and weapons specialist, Duncan is Teela´s adoptive father and one of the most brilliant scientific minds on the planet. He has hidden the fact that Teela's mother has been the Sorceress for years, and now that she knows the truth, he tries to rebond the love between a mother and daughter. He has been Adams's confidant and mentor since he first held the sword of power and is willing to lay his life down for the royal family at any time.