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 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.

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.

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

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.

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

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.

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

Kevin arrives at the Ville his father served in. Kate pursues a new opportunity. Randall debates Councilman Solomon Brown. In the past, Jack struggles to get through to his brother.

Randall's campaign comes to a close. Kevin meets someone from Zoe's past. Kate and Toby get ready for the baby.

Rebecca and the Big Three reckon with secrets Jack kept from them. Jack's Vietnam story continues to be revealed.

Kevin attempts to help Nicky. Randall and Kate reflect on differing memories of their childhood.

Beth's trip home to care for her mother sparks an unexpected realization.

Kevin keeps a secret from Zoe. Randall gets unexpected news about Deja. In the past, the Big Three graduate from High School.

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

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

Rebecca helps Kate and Toby care for baby Jack. Zoe and Kevin look after Tess and Annie. Randall and Beth consider how to move forward.