When King Arthur discovers that one of his knights is plotting to seize the throne and marry his daughter, danger looms over the kingdom. After the King's death, the ambitious knight seeks to marry the princess, but the wise wizard Merlin commands him to draw the sword from the scabbard to prove his rightful claim to the throne. Cast: - Janette Scott as Katherine - Ronald Lewis as Robert Marshall - Ronald Howard as Edmund of Cornwall - Mark Dignam as King Arthur - John Laurie as Merlin - Jerome Willis as the Limping Man - Charles Lloyd-Pack as the Doctor - Francis de Wolff as the Blacksmith Runtime: 85 minutes