Watch Blue Bloods Online: Season 7 Episode 21

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Did Erin find out the truth?

That was a key question on Blue Bloods Season 7 Episode 21 when she realized that someone tampered with her evidence. 

Meanwhile, Danny and Baez teamed up with Russian operatives to search for a dangerous man who entered the country on a diplomatic visa. 

Did they find him before it was too late?

Also, Frank got involved with a case concerning the archbishop. 

Use the video above to watch Blue Bloods online to get up to speed with the latest drama for the characters. 

Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.

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Blue Bloods Season 7 Episode 21 Quotes

Garrett: We both knew this issue would land on our desk sooner or later.
Frank: It didn't just land, it was placed by the mayor.

Frank: As far as I'm concerned if you worked that pile and got sick, you and your family should be taken care of, end of story.
Garrett: You're not an insurance claims adjustor.
Frank: For which I thank God every day.