Blue Bloods - Season 4 - Eps 9: Bad Blood
Danny and Baez investigate a homicide in which Baez’s estranged brother, a former drug addict, is the lead suspect. Frank learns one of his most highly decorated officers, a German Shepherd in the K9 unit, is being accused of brutality. Henry investigates the widow of a former NYPD pal who might have had a hand in her husband’s death.
About Blue Bloods

Title: Blue Bloods
First Air Date: 2010-09-24
Last Air Date: 2024-12-13
Status: Ended
Rating: 7.81/10 (from 917 votes)
Language: EN
Seasons: 15
Total Episodes: 293
Network: CBS
Genres: Crime, Drama
Production Companies: CBS Productions, Paw in Your Face Productions, Panda Productions
Synopsis
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.
Cast

Tom Selleck
Frank Reagan

Donnie Wahlberg
Danny Reagan

Bridget Moynahan
Erin Reagan-Boyle

Will Estes
Jamie Reagan

Len Cariou
Henry Reagan

Gregory Jbara
Garrett Moore

Abigail Hawk
Abigail Baker