Trent seeks answers for his ongoing health issues.

Jonah gives Trent and Amber some devastating news.

The Johnstons pursue their family history with the help of a genealogist.

Trent and Amber take the family to an improv class to help Emma.

The Johnstons camp out in the backyard while renovations are underway.

Trent and Amber decide to take a road trip from San Diego to San Francisco.

The family enjoys time in San Francisco for the little people's conference.

The start of the school year is approaching fast.

School is back in session, with mixed feelings from the kids.

Anna is finally ready to leave for college, and the excitement sets in as she and her sisters do some back to school shopping. A family dinner gets tense as Trent upsets Emma. Move-in day finally comes and the small size of the dorm is a big shock.

The kids rope Trent and Amber into viral video challenges.

Kim and Barry Plath face a tough decision for 16-year-old daughter Moriah.

The sheltered life of the Plath children is coming apart at the seams.

Moriah returns from San Francisco, and plans for a new band are discussed.

Can anybody potty train the quints?

Uncle Nick and Aunt Ashley get a crash course in watching the Busby quints!