Blue Bloods - Season 8 Episode 21 : The Devil You Know
A drama about a multi-generational family of cops dedicated to New York City law enforcement. Frank Reagan is the New York Police Commissioner and heads both the police force and the Reagan brood. He runs his department as diplomatically as he runs his family, even when dealing with the politics that plagued his unapologetically bold father, Henry, during his stint as Chief.
First Air Date : Sep 24, 2010
Last Air Date : Oct 25, 2024
Runtime : 45 min.
Stars : Tom Selleck, Donnie Wahlberg, Bridget Moynahan, Will Estes, Len Cariou, Gregory Jbara, Abigail Hawk, Long Nguyen, Rich Henkels, David McKittrick, Ryan Faucett
Quality : 
- Eps. 1 : Cutting Losses2017-09-29
- Eps. 2 : Ghosts of the Past2017-10-06
- Eps. 3 : The Enemy of My Enemy2017-10-13
- Eps. 4 : Out of the Blue2017-10-20
- Eps. 5 : The Forgotten2017-10-27
- Eps. 6 : Brushed Off2017-11-03
- Eps. 7 : Common Ground2017-11-10
- Eps. 8 : Pick Your Poison2017-11-17
- Eps. 9 : Pain Killers2017-12-01
- Eps. 10 : Heavy Is the Head2017-12-08
- Eps. 11 : Second Chances2018-01-05
- Eps. 12 : The Brave2018-01-12
- Eps. 13 : Erasing History2018-01-19
- Eps. 14 : School of Hard Knocks2018-02-02
- Eps. 15 : Legacy2018-03-02
- Eps. 16 : Tale of Two Cities2018-03-09
- Eps. 17 : Close Calls2018-03-30
- Eps. 18 : Friendship, Love, and Loyalty2018-04-06
- Eps. 19 : Risk Management2018-04-13
- Eps. 20 : Your Six2018-04-27
- Eps. 21 : The Devil You Know2018-05-04
- Eps. 22 : My Aim is True2018-05-11
