The Pearsons gather to celebrate their 40th birthday while musing about the day they were born.

Kevin and Madison navigate their engagement as Kate and Toby take a big step in their adoption journey. Jack and Rebecca brace for puberty.

Deja's life with her mom, Shauna, and great grandmother Joyce unfolds from the very beginning. Randall and Beth welcome visitors to their home.

Jack and Miguel bond. Kevin and Madison navigate challenges. Randall seeks out a new kind of support network.

Kevin takes the twins to the cabin in hopes of proving himself as a father.

Kate and Toby go to Las Vegas for their bachelor/bachelorette parties. Meanwhile, Jack and Rebecca celebrate their wedding anniversary.

A young Jack makes a decision that will impact the course of his life.

Beth and Randall adjust to their new normal. Kate and Toby spend time with baby Jack. Zoe and Kevin work on their relationship.

Kate confronts her past. Randall's brush with viral fame leads to an unexpected discovery. Kevin debates the best path for his future.

Beth navigates qualms with her mother. Kevin and Kate bring their families together for dinner.

Kevin and Madison partake in their respective bachelor and bachelorette parties.

Jack, Randall, Kevin and Toby struggle to connect with their children.

Beth prepares her dancers for the first big dance recital at her new job.

Kate visits Toby.

The Pearson family comes together to support Kevin at his movie premiere. The teenage Big Three confront college decisions in the wake of Jack's death. Kate and Toby start IVF.

Kate and Toby try to keep busy while waiting for big news. Randall embarks on a new journey. Kevin meets someone from his father's past.

The Pearsons have an unconventional Thanksgiving dinner. In the past, Jack, Rebecca and the big three spend Thanksgiving with Miguel.

A series of car rides propels the Pearson's towards new stages of their lives.

Beth navigates her career path. Kate and Toby face unexpected issues. A run in with someone from his past gives Kevin pause.

Toby throws a wrench in Kate's weight loss journey. Randall struggles to accept his father's deteriorating health. Miguel and Shelly break some devastating news to Jack and Rebecca, which makes them worry about their own relationship. Rebecca receives an amazing work opportunity. Kevin examines his romantic past.

Randall and Beth adjust to a new family dynamic. Kate books her first big gig. Kevin suffers a setback on his movie. Jack and Rebecca are visited by an unwelcome guest.

Kate goes wedding dress shopping. Kevin embraces a new lifestyle while Randall explores William's past. Jack and Rebecca take the kids to the mall.

Tensions run high as the Pearsons await news about Kate's pregnancy.

Malik shadows Randall at work. Kevin struggles to connect with his new movie director. Jack and Rebecca struggle to sleep train their babies.

Kevin visits Randall in Philadelphia.