The family in "Sister Wives" has left the state -- the Browns have moved to Las Vegas -- but the former Utahns return to television with an hourlong episode on Sunday, Sept. 25, at 10 p.m. on TLC.

The Browns have left Utah, but they aren't leaving Utah alone. In July, their attorney filed a lawsuit seeking to strike down the Utah's bigamy law, which makes it a felony to marry or cohabitate with more than one person.

Whether we'll see anything about that in upcoming episodes is a mystery at this point. But we do know that upcoming episodes, the first to air since June, will include plenty about the upcoming addition to the family -- the impending birth of Robyn's (Wife No. 4) baby.

Here's TLC's description of what we can expect from the second half of Season 2:

Season two continues as the family struggles to make a home for themselves in Las Vegas, isolated in four separate houses far away from their tight-knit religious community.

Each episode follows the Browns as they adapt to their new surroundings and changed family dynamic -- from Kody facing the challenge of the wives living in different houses, to the children struggling to fit in and make friends at a new school, to Kody and the Sister Wives exploring the creation of a family business.

On top of everything else, there's now the excitement and preparation for the new addition to the family.

Viewers will follow Robyn through every step of the pregnancy, from when she shares her happy news with the family, to the moment when they learn the baby's gender, to the expected home delivery.

Through it all, the Browns continue to support and love each other while navigating the challenges of living a plural lifestyle.