Randall hosts a Super Bowl party while Kevin and Kate reconnect with the past.

The Pearsons gather around Rebecca's bedside.

Randall and William take a road trip to Memphis, where Randall learns about his biological father's past.

The Big Three reconnect at the family cabin.

Miguel over the years.

Kevin helps Randall and Beth with a project. Kate contemplates a big gift for Toby. Jack and Rebecca talk about their future.

The Pearsons gather to celebrate Baby Jack's first birthday.

As their paths cross and their life stories intertwine in curious ways, we find that several of them share the same birthday and so much more than anyone would expect.

The Pearsons come together under unexpected circumstances. Meanwhile, Jack surprises the family with a summer vacation.

Rebecca finds solace with an old friend as the Pearsons struggle to cope with tragedy. Jack teaches Kevin and Randall to drive.

The Pearson family gathers for their first Thanksgiving at Randall's Philadelphia townhouse.

The Big Three makes a plan for Rebecca.

Kevin goes back to his high school to accept an award. Jack and Rebecca get excited about their kids' futures.

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.

Jack visits Ohio.

As Jack, Rebecca and the three kids make their way to Rebecca's parents' house for their traditional Thanksgiving holiday, an unforeseen detour occurs. Kate makes two drastic life-changing decisions. Kevin brings Olivia to Randall's house for Thanksgiving. Randall's heart is broken when he learns about a lifelong secret his mother has kept from him.

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

The Pearson family finds themselves at the hospital on Christmas Eve after little Kate comes down with appendicitis. When they run into Dr. Katowski, who is alone at the hospital, they realize they need to be there for him as much as he was once there for them. Presently, Kevin celebrates Hanukkah with Olivia and her family, Kate continues to pursue her big surgery and someone from William's past reappears in his life.

As Kevin stresses about the premiere of his play, he receives support from an unexpected source. Randall struggles under the pressure of both his work and ailing father. Rebecca and Jack's Valentine's Day doesn't go as planned. Toby and Kate decide to dig deep and get to know each other's biggest secrets.

The entire Pearson family gathers at Randall's for an unusual party. Kevin and Sophie's relationship deepens on the night of his play's premiere. Kate struggles to open up to Toby about her father's death. Tensions are high between Jack and Rebecca as she leaves on tour with her band.

Jack meets Rebecca's parents. New characters are introduced.

Randall uncovers new truths about his past.

The Pearsons navigate huge family milestones together, from a distance.

The night before Kate's wedding, Kevin's love life takes an unexpected turn.

As the birth date of her triplets quickly approaches, a frazzled and emotional Rebecca forgets Jack's birthday. Dr. Katowski struggles with the loss of his wife and wonders how he'll be able to continue on with his life without her. Joe, the firefighter who delivered baby Randall to the hospital, fights to save his marriage.