The Pearson Family Is Back! Here's What to Remember About This Is Us Season 4

Things end on a positive note for Kate. Her and Toby happily celebrate Jack's first birthday after experiencing a tough year navigating his special needs. They visit the NICU to post a family photo on the Wall of Fame. While leaving the hospital, the couple decides they're ready to give Jack a sibling and make plans to adopt a baby. Things seem to eventually work out — a glimpse into the future shows a grown up Jack celebrating the birth of his first baby, with a visit from someone we presume is his sister.