Did Frank win the battle against a data-tracking company?
That was revealed on Blue Bloods Season 8 Episode 21 when they refused to unlock the phone of a terrorist which could have information on upcoming targets.
Meanwhile, Erin tried to find out information about a murder from a source, but was it too late?
Also, Jamie and Eddie tried to locate a woman who kidnapped a newborn baby, but did the woman have a good reason for doing it?
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.