Oct. 25-Nov. 9. Fridays & Saturdays at 7:30 pm; Sundays at 3 pm. $17. $15 senior discount. Tickets at www.jpactheatre.com or by calling 708-656-1800. Begins as a conventional English thriller set in a country home: a sex-starved wife and her lover plot the murder her stuffy husband. But nothing is quite what it seems in this outrageous whodunit.