Águila Roja was a popular Spanish adventure series from TVE, set in seventeenth-century Madrid and centred on a schoolteacher who secretly fought injustice as a masked hero. Its orchestral opening became closely linked with the show's mix of action, intrigue and romance, and it was widely recognised by Spanish television audiences during the series' long run. Years later, the theme still circulates in fan edits and nostalgic clips because it instantly evokes that heroic identity, even for viewers who remember the series only through its music.