We learned what The Bogeyman is on Blue Bloods Season 4 Episode 12 - and it wasn't anything good.
This is a new and deadly form of heroin, the investigation into which was at the center of this week's installment.
Frank had an unexpected reaction to users of the drug, while Garrett came right out and said if you stick a needle into your arm… you pretty much deserve to die. You know you're taking a rather big chance.
But Frank pushed forward with drug buy back program, one that may have left many viewers a tad confused.