In the fourth episode of Blue Bloods' final season, "Past Is Present," the Reagan family is confronted with the echoes of their past, forcing them to navigate the treacherous waters of legacy, trust, and the weight of family history. This episode is a masterclass in storytelling, weaving together multiple narratives that explore the complexities of family, duty, and the consequences of one's actions.

Detective Danny Reagan, played by Donnie Wahlberg, finds himself entangled in a case that hits close to home. He had previously helped a young woman, Trina, by getting her out of jail time and securing her a job. However, when she quits and steals from her employer, Danny is left to pick up the pieces. His attempt to track her down leads to a series of events that reveal Trina's descent into danger and her connection to a past case involving a man named Jayden, who was once running her crew .
Meanwhile, Assistant District Attorney Erin Reagan, portrayed by Bridget Moynahan, experiences a brush with violence when a shooter opens fire at her table during a lunch with Anthony. The incident could have been a case of mistaken identity, as the shooter was possibly targeting mobster Mario Vangelis, who had joined them at the table. However, Vangelis insists that the bullets were meant for Erin, claiming that he is now out of the game and that Erin poses a greater threat to the streets .
The family's patriarch, Frank Reagan, faces a difficult personnel decision when he learns that the son of Sonny Malevsky, a known crook who killed Frank's son Joe, is now a cop. Officer McPhadden, who went by his mother's maiden name, had omitted this information from his application. This revelation forces Frank to grapple with the question of whether the sins of the father should be visited upon the son .
Jamie Reagan, played by Will Estes, becomes suspicious when his grandfather Henry is asked to be interviewed for an investigative web series by a podcaster named Allison. Allison, who has a history of making cops look bad, is now focusing on true crime podcasts. Jamie is concerned about her motives, especially when he learns that she plans to involve Henry in a podcast about police problems .
The episode also delves into the personal life of Erin, who, after the shooting incident, must face the reality that she was likely the target. With the help of Anthony, they work to uncover the reason behind the attack. The investigation leads them to the realization that Erin's work as a prosecutor has put her in the crosshairs of dangerous criminals .
"Past Is Present" is a powerful installment that showcases the show's ability to blend gripping crime drama with heartfelt family moments. The episode is a reminder of the show's enduring themes: the importance of family, the weight of duty, and the courage it takes to face the darkness that lurks in the shadows of the city. As the series continues to unfold, fans are left with the assurance that the Reagan family's legacy will be one of unwavering commitment and steadfast integrity .