Over 12 million people tuned in for the series premiere of Blue Bloods. Were you among them?

Looking ahead, this CBS drama airs the episode "Samaritan" on Friday. It will focus on the rights and wrongs of vigilantism and you can watch the official preview now:

[video url="http://www.tvfanatic.com/videos/samaritan-promo/" title="Samaritan Promo"] [/video]

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.