The Big Three are born, ushering in the end of Summer with a bang! The Pearson family goes through the emotional wringer with the birth of the triplets, the loss of one child, and finally the discovery of baby Randall. Not only are Randall (Sterling K. Brown), Kevin (Justin Hartley), and Kate (Chrissy Metz) born on this day, but it's also the 36th birthday of one Jack Pearson.