Season 2 Episode 21 episode 21

Blue Bloods Season 2 Episode 21 "Collateral Damage" Promo

Blue Bloods Season 2 Episode 21 "Collateral Damage" Promo

The final two episodes of Blue Bloods will pack a punch - and that's not the only hit. Check out the first promo for Blue Bloods season 2 episode 21 "Collateral Damage".