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 a staff writer for TV Fanatic. Follow him on Twitter.