Blue Bloods Season 14 finale is gearing up to be an epic comeback with two long-absent cast members making a return. Sami Gayle, who played Nikki Reagan Boyle, will be back after a two-year hiatus, and Jennifer Esposito is set to return after a decade away. The negotiations for Esposito’s return took weeks, and her comeback is seen as a crucial move for the series. Nikki Reagan Boyle, portrayed by Sami Gayle, is Frank Reagan’s granddaughter, known for her liberal ideologies. Jack, another Reagan grandchild, will also make his first appearance since the start of Season 12. Jennifer Esposito, who portrayed Detective Jackie Curatola, left the show amid controversies and is now set to assist Danny and his current partner in their search for a serial murderer.