"Blue Bloods" has captivated audiences with its compelling portrayal of the Reagan family, a dynasty of New York City law enforcement officers. While the show centers around the core family members, a rotating cast of guest stars has brought in diverse perspectives and storylines, adding layers of depth to the already engaging narrative. Among these guest appearances, a select few have left a lasting mark on the show, contributing significantly to its success. Here are five guest stars who made a notable impact on "Blue Bloods":
Dylan Walsh: The Opportunistic Mayor
Dylan Walsh, known for his role as Dr. Sean McNamara in "Nip/Tuck," brings a captivating presence to "Blue Bloods" as Mayor Peter Chase, a character that both fascinates and frustrates viewers.

Introduced in Season 10, Mayor Chase quickly establishes himself as a shrewd politician who, unlike the Reagans, prioritizes his own ambitions over integrity. He's a master manipulator, using charm and promises to get what he wants, even if it means compromising his principles.
His dynamic with Erin Reagan, who is running for District Attorney, highlights this power play. He pledges his support to her campaign, but only because he views her as a pawn to advance his own agenda.
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