OKOBOJI — Mystery returns to the Okoboji Summer Theatre stage with J.B. Priestley’s “An Inspector Calls.” Suspense rules when a middle-class Yorkshire family meets the enigmatic Inspector Goole, in this English classic "whodunit." The show will run from Tuesday, July 12 through Sunday, July 17, and this production is sponsored by the Kemna Auto Center and the Andrea Waitt Carlton Family Foundation.