Arranged marriages are complicated by definition: The bride and groom are selected by a third party rather than by each other. Entire families immerse themselves in the relationship, from the lead-up to the wedding and beyond the ceremony. The reality series “Arranged” follows this age-old process for, among others, a Queens, N.Y., couple of Romanian descent who live by Gypsy teachings, a deep-rooted Southern duo from South Carolina, and an L.A. couple raised by traditional Eastern Indian parents. As each husband and wife adjusts to new roles and faces a level of intimacy not common in most modern unions, issues like pregnancy scares, money squabbles and meddling parents add more stress and potential roadblocks to long-lasting arrangements.