Jack Reagan’s sudden disappearance has puzzled fans for years, and the truth behind his vanishing act uncovers a mix of in-story choices and real-life decisions—from his character leaving for college to actor Tony Terraciano stepping back so filming wouldn’t interfere with his studies, all while remaining officially not written off the show. But just when viewers feared he might never return, a 2021 teaser featuring Jack at the iconic family dinner hinted that his comeback may be closer than anyone expected…