Kevin and Zoe land in Vietnam. In the past, Jack and Rebecca take a road trip to Los Angeles. Jack's war story continues to be revealed.

Kate struggles with Toby's depression. Randall makes time for Kevin, who obsesses about Jack's past.

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.

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

Jack's legacy impacts his adult children's lives in meaningful ways, as Kate undergoes a medical procedure, Kevin begins a search to discover his father's past and Randall makes a big decision. Rebecca makes the most important choice of her life.

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.

Big changes are afoot for Kate, Kevin and Randall as they celebrate their 38th birthday. Jack and Rebecca go on their first date. Deja turns a corner.

The Pearsons come together to celebrate Kate and Toby's wedding. Wedding planners Kevin and Randall struggle to pull off the big day. Kate is flooded with memories of Jack. Deja struggles to adjust to her new living situation.

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

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