During his attempt to trap the Phantom of the Opera, Raoul does NOT call on just any Paris police, but rather Inspector Javert (Les Miserables). After the Chandelier falls, Raoul is held up, and instead it is Javert who receives Madame Giry's warning (Keep your hand at the level of your eyes) and pursues the Phantom into his layer. Can Javert make the arrest, or will Christine be forced to marry the Phantom of the Opera.
This is the standard Broadway musical versions of each character. No help, so Christine and Raoul aren't able to interfer for whatever reason.