Blue Bloods - Season 4 Episode 21
After a detective from Danny's precinct is killed while working undercover, Frank goes above and beyond to find the killer only to discover that the victim held a big secret; Jamie and Eddie help Nicky track down a homeless former classmate.
- Zhanri: Crime, Drama
- Studio: CBS
- Fjalen: new york city, police, police station, police commissioner, police procedural
- Cast: Tom Selleck, Donnie Wahlberg, Bridget Moynahan, Will Estes, Len Cariou, Gregory Jbara
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