Classic Fantasy - Sinbad and The Eye of the Tiger (1977)

Sinbad seeks the hand of Princess Farah (Jane Seymour) in marriage-but her brother, Prince Kassim, who must give his blessings for the marriage, has been turned into a baboon by his evil stepmother. Sinbad races across the seas against the evil witch and her son to restore the prince's humanity for his coronation as King-and for the approval of Sinbad's marriage.