Tensions fly when the Browns hit the road for their Spring Break trip along historic Route 66.

Kody is frustrated about his role in the decision making process of the family. Do the wives agree that he is not in charge?

The Brown family from TLC's "Sister Wives" give their opinions on the best parts of a polygamist marriage.

Maddie explains her dating do's and don'ts and why polygamy is not in her future.

The Browns from TLC's "Sister Wives" share their thoughts on their kids following the polygamist lifestyle.

The Browns from TLC's "Sister Wives" talk about the similarities and differences between monogamist and polygamist marriages.

The Browns reach the last stop on their road trip, as they meet the Richards, a Christian polygamist family.

The "Sister Wives" and Kody share their thoughts on how to make a polygamist marriage work.

Sometimes when you're in a rush it's easy to lose track of the children. This goes for any parents. With so many kids Cody says he sometimes has take take a note from the farming handbook and count the kids like cattle.

Christine's daughter Mykelti brings a boyfriend home.

The wives explain the definition of plural monogamy. They prefer to be more of a cohesive family unit. While it does take work, they are willing to commit to a life together.

The Browns get a scare when Truely falls ill.

Mariah has a special memory of Kody's dad Winn who passed away recently.

Kody's first wife Meri tells him she's going back to college now that their daughter is away at school.

The Browns go to San Francisco, and the sister wives do some shopping.

During the ceremony several of the children get choked up when saying what they are thankful for, many of them have learned valuable lessons from their parents.

The Browns explore the possibility of having "brother husbands" instead of "sister wives."

Robyn and Kody fear a miscarriage during their baby's ultrasound appointment.

The newlyweds have a big announcement to make and they worry how the rest of the Brown family will react.

The teenagers throw a co-ed pool party.

Four of the oldest Brown teenagers discuss their college and career aspirations.

The Brown children discuss practicing polygamy with their close friends.

On their family camping trip, Hunter is making nothing easy, and Kody minces no words when he declares that "Hunter is a raging, testosterone monster."

Christine expresses concern with how Kody spends his time. She thinks he caters to Robyn, her family, and their relationship.

Danielle, a college professor and minister, sits down with Kody and the wives to discuss some pretty tough questions.

The family travels to Boston to explore colleges for the oldest kids while also facing their fears head on - they agree to sit on a panel speaking to college students about their lives.

Kody proves to be a time management genius when traveling -- and sharing time -- among four wives.

The family brainstorms potential baby names for "Baby Boy #17."

The family gathers at Robyn's house for an exciting announcement!

Coming up this season on Sister Wives...

Kody has "perfect timing" with a special surprise gift for Christine.

Meri's struggle to conceive has been an intensely emotional experience for her. Through tears, she discusses her decision not to pursue in vitro fertilization.