Watch Blue Bloods Online: Season 8 Episode 18Paul Dailly at .
Did Danny manage to find a killer from a cold case?
That was revealed on Blue Bloods Season 8 Episode 18 when a mother expressed her outrage about the NYPD's inability to find her son's murderer, and Danny stepped in.
Meanwhile, Erin, and Anthony were forced to explain flaws they made in a previous case.
Also, Erin and Jack waged war in court after their divorce was finalized, but which one of them came out on top?
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.