Characters like Zorro and Sherlock Holmes are enduringly popular. So enduringly popular, that they outlive their copyrights and enter the public domain. Trouble is that the owners of the rights to these characters try everything they can think of to prevent rival stories being released to the public. On May 11, 2018, a Federal Court ruled that Zorro was firmly in the public domain and a rival musical “Z - The Musical of Zorro” did not infringe on any rights held by Zorro Productions, Inc. Problem is that Zorro Productions Inc. holds a registered trademark on the mark “Zorro” for “theater productions.” Will this work? Nova Southeastern University's Copyright Officer, Stephen Carlisle J.D., explains this gambit and what it might mean for future public domain characters.