After years of hiding their lifestyle, Kody and his four wives are off to New York to appear on national television for the first time as open polygamists. Meanwhile, back home, the Brown family kids embark on their first day of public school.
The Browns travel to Wyoming to visit Kody's family ranch in hopes of finding some tranquility in the wake of the police investigation involving the family. Also, viewers find out about Kody's family history.
Kody and Janelle spend some one-to-one time together during a private camping trip which results in a discussion about family finances. Meanwhile, back at home, Robyn begins to worry about being a financial burden on the family.
The Brown family celebrates Halloween, which includes having to come up with 21 different costume ideas and carving 24 pumpkins. Later on, 16 of the Browns hit the neighborhood to trick-or-treat.
It's Wife #3's turn with Kody! Christine and her kids head to Vegas so they can spend time some alone time with their dad in her favorite vacation spot. Meanwhile back at home, Meri decides to take the rest of the family out for a bowling night.
The wives invite their monogamous friends over for dinner. Also, Meri goes to the doctor for a cancer screening and finds out that she has a benign polyp in her colon, unlike her deceased sister.
The Browns celebrate Christmas by heading to a snowbound cabin in the mountains, escaping the pressure of the ongoing police investigation at home. Later, the family make the big announcement that they're moving to Las Vegas.
The wives have trouble accepting that this will be their last Christmas in Utah and the mounting tension from the ongoing police investigation leads to massive changes in the family dynamic.
Kody, Meri, and Robyn search for a new house in Las Vegas but, after arriving, they quickly learn that there are no polygamist houses available. Back at home in Utah, the rest of the family plans a surprise birthday party for Meri.
Kody and the wives prepare for the move by telling the younger children and packing up their homes. Later, plans turn to panic when the media gets wind of the news.
The Browns arrive in Las Vegas and search for a home where they'll be able to rebuild their lives. Later, Robyn announces to the public that she is pregnant.
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.