For Grace Verzosa Ambat, Hollywood came knocking. More specifically, Hollywood location scouts Chris Baugh and Lori Balton—who had spent weeks combing Los Angeles neighborhoods for a house that evoked 1970s Tehran—left a letter at her door with a phone number. Ms. Ambat's son returned the call, and soon after, a crew of about 100 descended to film at her family's house day and night. The actors slept there for a week. The street was lined with 25 trucks and trailers.