Blue Bloods: Season 7, Episode 21

7 - 21: Foreign Interference

Danny and Baez team up with two Russian operatives to search for a dangerous Russian man who entered the U.S. on a diplomatic visa. Also, Frank gets involved in a sensitive case involving Archbishop Kevin Kearns (Stacy Keach), and Erin and Anthony scramble to find out who tampered with evidence in one of their cases