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Blue Bloods

The Devil You Know

E21    May 4, 2018    45m    TV-14
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Frank locks horns with a data-tracking company when it refuses to unlock a terrorist's phone that may hold information regarding upcoming targets; Erin obtains information about an impending murder from a shady source; a woman kidnaps a baby.
Where to Watch The Devil You Know
Cast of The Devil You Know
  • Tom SelleckFrank Reagan
  • Donnie WahlbergDanny Reagan
  • Bridget MoynahanErin Reagan-Boyle
  • Will EstesJamie Reagan
  • Len CariouHenry Reagan
  • Vanessa RayEddie Janko
  • Abigail HawkAbigail Baker
  • Marisa RamirezMaria Baez
  • Sami GayleNicky Reagan-Boyle
  • Steve SchirripaAnthony Abetemarco
  • Nellie CampbellSofia
  • Kris ArnoldFather Denby
  • Mike DonovanJohn Romano Jr.

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