"Little Fish" is the eleventh episode of the first season of Blue Bloods.
Danny Reagan and Jackie Curatola investigate the murder of a high-end escort after her body is found floating in the East River. Meanwhile at the crime scene, Jamie Reagan meets Det. Sonny Malevsky (Michael T. Weiss), his late brother Joe Reagan's old partner and is suspicious of him. Frank Reagan vows to bring a killer to justice when a missing boy's remains are finally found from a 25 year-old case that he was emotionally involved in.