"Blue Bloods" character Jack Reagan, played by Tony Terraciano, has been noticeably absent from recent episodes of the television series. While Jack's character left for college in 2018, the real-life actor also began attending college, causing gaps in his appearances on the show. However, he has not been written off and may return in the future. Fans were relieved when Jack made a brief appearance in the latest season's premiere episode, hinting at the potential for his character to have a more significant role in upcoming episodes. With the show renewed for two more seasons, there's a possibility for Jack to continue the Reagan family legacy in law enforcement.