After a memorable run of 12 seasons, The Big Bang Theory ended in 2019, but fans still crave updates on their beloved characters.   Fortunately, Young Sheldon continues the legacy, now in its fourth season, and the premiere brings a heartwarming revelation: Sheldon and Amy have a son named Leonard Cooper.   As Sheldon narrates, "It was the best graduation party I had ever been to—that is, until the one we had for my son, Leonard Cooper."   Let's watch the video...