'Sister Wives' Stars Want to Move Back to Utah to Be Closer to Other Plural Families (Exclusive)

In ET's exclusive preview clip of Sunday's 'Sister Wives,' the Browns open up about feeling isolated from other plural families while they live in Arizona. Kody, Meri, Janelle, Christine and Robyn take a trip to visit their pals, the Dargers, who also lead a plural lifestyle. The Browns admit that they often feel isolated while living in Arizona, away from other plural families. 'Sister Wives' airs Sundays at 10 p.m ET/PT on TLC.