PORTSMOUTH – Just in time for the spooky season, “And Then There Were None,” written by Agatha Christie and directed by Ben Bagley, will be on stage at the Players Ring from Oct. 23 through Nov. 15. Ten strangers are summoned to a remote island mansion—each drawn there for reasons that don’t quite add up. None of them knows their elusive host, and yet… it soon becomes clear that someone knows far more about them than they do about each other. Not long after they arrive, the atmosphere shifts. What begins