Robyn finally announces her new pregnancy; the older teens' discontent over their new life starts to bubble to the surface.

Kody, Christine and Janelle experiment with working in real estate; the teens are going out with new friends in Las Vegas; Robyn and Kody receive a scare.

After finding out Robyn's been spotting, she and Kody rush to see their midwife to find out what's wrong. Will their worst nightmare come be a reality? Later, the wives are on a mission to make over one room in each house.

We follow Kody through four days of his astonishing life, moving each day to the house of a different wife. Hear how his family and relationships with his wives has changed since the move. Plus, we finally learn the sex of Robyn and Kody's baby.

Kody and his wives finally return to his hometown for the first time as open polygamists. How will his childhood friends receive him? Later, after revealing the sex of the baby, Robyn and Kody finally decide to announce the name.

The sisters open up about an issue that has bothered all of them—their weight! Watch the sisters speak candidly about their battle with the bulge and see their attempts to the shed pounds as they they make their way to a gym for a body fat analysis.

Christine's daughter, Ysabel, and Robyn's daughter, Breanna, are moving out—to Meri's house. But will Meri be in over her head having them temporarily under her roof? Then, the Browns are off for some camping fun, but the teens have different ideas.

When another couple from the Browns' church in Utah comes to visit, the conversation turns to polygamy. How will the Browns respond to questions surrounding courting another wife and dealing with jealousy? What advice will they offer to ensure success?

The Brown family nervously accepts an invitation from a religious professor to talk to her students in Boston. Anxious about the question they will face, how will they respond? Meanwhile, the older teens tag along to visit some of Boston's best colleges.

The Sister Wives get makeovers and head to the strip for a night on the town while Kody stays home to babysit all the kids. How will they react when they come face to face with all the "adult" entertainment Vegas has to offer?

Kody heads for the Vegas strip for a guy's night out on the town, testing his wrestling skills against a mixed martial arts fighter and answering his friends' questions about his lifestyle. Meanwhile, the wives help setup Robyn's new nursery.

The Sister Wives are buzzing with excitement as Robyn's first contractions finally kick in. But not everyone is happy about it. The emotion builds as each of the Browns face their true feelings about Robyn's family becoming their own.

The teachers are in for a big surprise when Kody and the wives all attend Parent/Teacher conferences for their kids. Later, Logan graduates from college, but not without some family mayhem. And Kody demands an answer from Meri about having another baby.

The Browns plan a vacation with their polygamist friends, the Dargers as they headi to the beach for some polygamist fun in the sun. For the first time we'll meet another polygamist family and discover how they're the same, or different from the Browns.

The dark side of polygamy is uncovered when the Brown teenagers volunteer for an organization that helps people escape from abusive polygamist families.

Tensions rise as the Sister Wives fight for the bonus features they want for each house. Who stays in budget and who goes way over? Later, the Brown family digs deep when the family pet is ailing. A compromise leaves them all in tears.

With the Sister Wives living separately for over a year now, the Brown family structure is falling apart. After stressing out over finances, the wives try hard to start a web business, and Christine makes another attempt to pass her real estate exam.

The wives plan a dream pilgrimage across country to Nauvoo Illinois, the birthplace of American polygamy. But the three-day road trip turns into much more than they bargained for as tempers start to flair and relationships get tested.

As the Browns prepare a proper send-off for Logan's graduation, Kody and the wives push hard to get moved into their new homes before Christmas. Will all the pressures of moving and decorating for the holidays get the better of them?

Kody rekindles a bro-mance with his old friend Brett. Meri's panic about her future empty nest grows as Mariah's graduation approaches.

The Browns throw a party to celebrate Mariah and Aspyn's graduation from high school, but Meri has a hard time thinking about Mariah leaving for college. Meanwhile, a fortune teller sees a fifth wife in Kody's future.

The wives take a road trip to San Francisco, where they work on their relationships by shopping for dresses for their commitment celebration. Meanwhile, Kody stays at home with all 17 kids.

Truely becomes seriously ill and requires immediate hospitalization, which puts Mariah's farewell party on the back burner.

Another family tragedy, the second in two months, interrupts the Browns' efforts to plan a party for their commitment celebration.

A dress rehearsal goes awry when the Browns are getting ready for their commitment celebration, and Kody and his wives wonder if all their hard work and planning will pay off.