(Photo courtesy of Merrimack Repertory Theatre site) “Promotional picture for the Theatre’s rendition of the play ‘Gaslight’.” Lynn Sullivan Connector Contributor The Merrimack Repertory Theatre (MRT) is proud to begin its 2023-2024 season with the world premiere of award-winning playwright Steven Deitz’s Gaslight. Produced in partnership with the Cincinnati Shakespeare Company, this new psychological thriller…