The Season 13 finale of Blue Bloods will feature a full dinner table, with several familiar faces returning for the episode. Jennifer Esposito, Stacy Keach, Dylan Walsh, Sami Gayle, Peter Hermann, and Tony Terraciano are among those making a comeback. The episode will see Danny and Baez teaming up with Danny's old partner, Jackie, to find a copycat killer. Meanwhile, Frank and Mayor Chase will clash over how to handle the city's growing homeless population, and Jamie, Eddie, and Erin will work together to gather evidence against a previously released criminal.