'Blue Bloods' Sneak Peek: Frank's Granddaughter is Kidnapped

Get ready for an intense episode of CBS’s Blue Bloods. In tonight’s hour, “Down the Rabbit Hole,” a serial killer named Thomas Wilder (guest star Louis Cancelmi) attaches a message to his latest victim addressed to Danny (Donnie Wahlberg). Their game of cat-and-mouse gets even more personal when Wilder kidnaps Danny’s niece, Nicky (Sami Gayle), daughter of ADA Erin (Bridget Moynahan).

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In our exclusive sneak peek above, Nicky’s grandfather, Police Commissioner Frank Reagan (Tom Selleck), has to decide whether to abuse the power of his position in the efforts to find her. Those who know Frank won’t be surprised by his decision.

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Blue Bloods is now in its sixth season, which comes to a dramatic end May 6 with a season finale that finds the public outraged after a grand jury doesn’t indict an NYPD officer for the controversial shooting of a teenager that was caught on video.

Blue Bloods airs Fridays at 10 p.m. on CBS.