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.