Are Danny's days numbered?
On Blue Bloods Season 6 Episode 20, the team members were alarmed to find a serial killer's latest victim with a harrowing message for Danny that would change his life forever.
The search for the murder led all the evidence back to Danny which made it even more difficult for the team to find them, but what was their obsession with Danny?
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Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.