The Klines are in Washington to host an adoption gala; they visit Mt. Vernon for some historical fun, then head to the Oval Office; Zoey's 5th cupcake birthday is a huge success until a food fight breaks out.

Jen and Bill nervously wait to meet their son William for the first time.

Baby-proofing the home; Jen gets some adoption news that could change everything.

Jen and Bill are officially matched with a little boy from China.

After seeing Bill with his brand new look for summer, Jen visits her stylist for a new hairdo. Later, Bill and Jen pick out plumbing fixtures and windows for their new home.

Jen and Bill have set up a meeting with an organization dedicated to finding parents for kids with special needs.

After a year of extreme highs and lows, the Little Couple is ready to enjoy life again; first, they're travel to Florida for the baptism of Will and Zoey; then they head to Washington D.C.

Zoey's dream comes true as she and her best friend have a special mermaid encounter. Then, Bill & Jen throw a big summer party for all of their friends but have to scramble when an unexpected Florida rainstorm threatens to ruin their big event.

Jen and Bill put the recent egg retrieval behind them and focus on their crazy work schedules; Jen is inspecting a new addition to the hospital; Bill brings a pet psychic to the pet store.

After years of waiting, the Little Couple is on the verge of moving into their new home and getting pregnant at the same time!

Jen, Bill, Judy, Dave and their five dogs are still living in a rental apartment awaiting their new house to be completed. They hope to move in soon, as the tensions risk bubbling over in the apartment. To blow off steam, the family goes bowling.

Jen's birthday finds Bill making plans for a romantic dinner, followed by the huge surprise of a specially modified brand new car.

Jen and Bill take a road trip from Houston to San Antonio; the couple reminisces about their first year in Houston and plans for a family.

The family is on a kilt quest in memory of their visit to Scotland. Upon arrival in London, Will and Zoey question a royal guard, ride the London Eye, partake in proper British tea and try to re-create the iconic Beatles cover of "Abbey Road."

Jen and Bill are flying to China to meet their adopted son.

The road to becoming parents has been a long one for The Little Couple. Finally, they meet Cindy and James, the couple that may be their surrogate family.

Bill and Jen have some big life-changing news to share and they're afraid their kids might not approve; the family visits the zoo with their friends for the last time; the family heads to Florida to finalize plans for the move.

In the second part of the season premiere, Jen is a keynote speaker at an event in Scotland, and the whole family tags along on a trip that includes a visit to a distillery, a castle where Will and Zoey feel right at home and Bill's decision to try haggis.

After returning from New York City, Bill juggles taking care of the kids and helping Jen as she recovers from her surgery.

The family tries to make the best of the Christmas season as they travel to New York City for Jen's hip replacement surgery.

The trip to China continues as the Klein family visits the Forbidden City and takes an immersive lesson in Chinese cooking. Then, the family climbs to the top of the Great Wall and reflects on what life could have been without Will.

Featured is a look back at Christmas time in the Klein household.

Bill takes Will to work so that Jen can spend some quality time with Zoey.

Bill and Jen have a safari-themed birthday party at the zoo for Will's fourth birthday.

Will has his weekly speech therapy; Zoey gets basic health screenings; Jen sees a physical therapist to improve her strength.

Bill attends a Pet Expo with his mother in law; Jen catches up at the hospital and watches the kids and dogs.

On the kids' first day of school, Jen's attempt at a picture results in a comical photo; when Will and Zoey take swim lessons, Will is like a fish in water but Zoey doesn't take to the pool.

Newlywed couple, Bill and Jen, both under four feet tall takes a road trip cross country before settling in Houston.

Jen's mom, Judy, is in town to help the Little Couple pack up their rental house. Their interior designer, Michael, shows them his design plans for the new house. Now, all he has to do is win Judy over with his designs.

It's Grand Opening Weekend for Bill's new pet store; Jen finds out she needs to get to LA for an egg extraction during the celebration.

Jen and Bill are hosting a cocktail reception in their home to celebrate the hospital and fire department coming together.

Taking a trip to San Francisco; Jen is invited to give a speech; the family makes sure she follows the doctor's orders.

Jen and the hospital go public about her illness and successful treatment; Bill's mother meets Zoe.

The Klein family settles into life at their new house but they have a lot of decisions to make about renovations; they shop for lighting and plumbing fixtures and test some paint colors with the kids; then, it's time for some barbecue and pool fun.

Bill takes Will grocery shopping for his school lunch supplies; Jen and Zoey get manicures and back-to-school haircuts.

It's Xmas time and Bill goes all out with the decorations much to Jen's dismay! Bill holds a pet adoption where Will & Zoey decide a new puppy is in order! With family visits, toy drive shopping, and letters to Santa, there's never a dull moment!

Bill and Jen's household has changed dramatically and they strive to find balance between family time and medical necessity.

Its back to everyday life in Houston where Bill & Jen keep busy with the kids after-school activities including karate and speech therapy while balancing their own careers. Uncle Joe visits so that he and Bill can test their special pee pad invention!

Bill wants a homemade dinner for his birthday and the team works to prepare the meal; when reading a story, Will shares some startling news that propels the family to talk about what it means to be little.

Jen and Bill have been living in a hotel, but are desperately trying to find a suitable temporary living situation while their custom home nears completion. The pressure is on because Jen's parents Dave and Judy, are due to arrive from Florida.

After accepting a job in St. Petersburg, Jen, Bill and the kids travel to Florida to find a perfect new home, but with specific needs and two curious kids, house hunting isn't easy; the family grabs a sweet treat to celebrate Jen's birthday.

It's back to everyday life in Houston, where Bill and Jen are busy with the kids' after-school activities, including karate and speech therapy, while managing their own careers. Meanwhile, Uncle Joe visits so he and Bill can test their pee-pad invention.