In Season 13 of Blue Bloods, the cast shares heartwarming stories about their bond off-screen. Bridget Moynihan, who plays Erin, has a special connection with her on-screen daughter, Sami Gayle, who describes Bridget as an additional mother. Sami credits Bridget with teaching her valuable life lessons and improving her acting skills. Despite leaving the show temporarily, there’s hope for Sami’s character, Nikki, to return, hinted by the showrunner. Nestor Serrano, known for playing Captain Derek Elwood, has a rich acting history spanning over four decades, including roles in Lethal Weapon 2 and Dexter.