Musical version of the Robert Louis Stevenson story about a doctor who conducts an experiment on himself that results in his bringing out the dark, murderous side of his inner self, "Mr. Hyde".
The exploits of a group of men and women who serve the City of New York as police officers, firemen, and paramedics, all working the same fictional 55th precinct during the 3pm to 11pm shift - the 'Third Watch'.