Who made New York plunge into darkness?
That's what the team tried to figure out on Blue Bloods Season 9 Episode 4 when the cops scrambled to contain the chaos.
Meanwhile, Frank learned some stunning revelations about the department and took swift action.
Also, Jamie and Eddie questioned the line between work and their relationship, but did they decide to stay together or apart?
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.