In this penultimate episode of the season, Sheldon (Jim Parsons) encounters a hitch when planning to get hitched to long-time girlfriend Amy: His mom won’t attend the wedding unless Sheldon also invites his estranged older brother, Georgie. It’s a smart move, because it brings to this show a continuation of the character, and friction-filled relationship, established on this show’s prequel sitcom, Young Sheldon. And as older Georgie, tonight’s guest star is familiar TV face Jerry O’Connell, most recently seen on Showtime’s Billions.