El Cid's title came from the Moorish rulers that he served under as a mercenary. El Cid comes from the Arabic Al-Sayyid, meaning "The Lord" or "The Master." His title in full Spanish was El Cid Campeador (The Master Warrior).
Sarah Perles said the most complicated thing was the nude sequences, "because I've never done so much nudity in my life," she revealed. "Feeling like another person with clothes on is not the same as feeling like another person completely naked," she explained. "When it came to the action, I was so lucky with the director and my co-stars. I felt so comfortable, that when it was time to get completely naked, I didn't think about my belly, about what they were going to see.... What I felt at that moment is desire, is the tension I had with my partner (Lorente), in that red room."