| Character | Actor | Season 3 Arc | |-----------|-------|---------------| | Sheldon Cooper | Iain Armitage | Faces first real academic rival, navigates early adolescence, deals with the consequences of his rigidity. | | Mary Cooper | Zoe Perry | Increasingly protective of Sheldon but also struggles with her faith vs. modern world (e.g., secular therapy, university temptations). | | George Cooper Sr. | Lance Barber | Gets more sympathetic writing — shown as a hardworking, emotionally grounded father, not just the drunk from TBBT . | | Meemaw (Connie) | Annie Potts | Her gambling/romantic subplots expand; becomes Sheldon’s co-conspirator more than Mary. | | Georgie Cooper | Montana Jordan | Major growth — starts working, dates older women, shows business instincts. | | Missy Cooper | Raegan Revord | Continues to be the witty, emotionally intelligent foil to Sheldon; gets more spotlight episodes. | | Dr. John Sturgis | Wallace Shawn | Recurring; relationship with Meemaw ends, but remains Sheldon’s mentor. | | Pastor Jeff | Matt Hobby | More comic relief; often clashes with Mary’s unconventional decisions. |
Meanwhile, Sheldon's family continues to provide a loving and supportive environment, despite their own quirks and flaws. His mother, Mary (Zoe Perry), tries to balance her role as a homemaker with her desire to pursue a career. His father, George (Lance Barber), works hard to provide for his family, often finding himself at odds with Sheldon's antics. Sheldon's twin sister, Missy (Raegan Revord), and older brother, Georgie (Chuck Lazzaro), also play important roles in the season, often serving as foils to Sheldon's eccentricities. Young Sheldon - Season 3