Watch Blue Bloods Online: Season 13 Episode 21

What changed for Jackie in the years since exiting New York?

On Blue Bloods Season 13 Episode 21, Danny and Baez were surprised by a shocking murder and turned to one of their closest allies for assistance.

Meanwhile, Frank and Mayor Chase battled over how best handle the city's rising homeless population.

Elsewhere, Jamie, Eddie, and Erin teamed up to build evidence against a previously released man who they believed was again committing criminal assault.

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