Warner Brothers, which owns the rights in the Harry Potter motion pictures, unsuccessfully tried to block release of the Bollywood film, Hari Puttar: A Comedy of Terrors. While Warner Brothers succeeded in delaying the originally planned September 12, 2008 release in India, a New Delhi court ultimately dismissed the lawsuit.
Even though the Hari Puttar lawsuit was decided under Indian law, the case provides a good excuse for me to discuss selecting titles for your films and television programs. Your title can raise objections from a producer with a similarly titled media production or from a trademark owner whose trademark finds itself in your title.