The first season of Blue Bloods, an American police procedural–family drama television series, aired in the United States on CBS between September 24, 2010, to May 13, 2011.

The series was created and along with Leonard Goldberg and Michael Cuesta, executively produced by Robin Green and Mitchell Burgess.

Actors Donnie Wahlberg, Bridget Moynahan, Will Estes, Len Cariou and Tom Selleck make up the main cast as the Reagan family—Danny, Erin, Jamie, Henry and Frank.

Internationally, the first season was very successful in Canada, United Kingdom and New Zealand, ranking among the top 30 most watched programs on the respective channels.

The first season also garnered positive reviews from television critics, praising the performances of lead actors Donnie Wahlberg and Tom Selleck and the family dynamic among the Reagans.

The corrupt cops were operating within a fraternal organization called the "Blue Templar", and murdered Joe when his covert investigation was getting close to exposing names.

[4] Staff directors for the season include Cuesta, Félix Alcalá, Jan Eliasberg, Karen Gaviola, Stephen Gyllenhaal, Ralph Hemecker, Gwyneth Horder-Payton, Frederick K. Keller, Matt Penn, John Polson, Michael Pressman, Rosemary Rodriguez, and Alex Zakrzewski.

[7] Donnie Wahlberg acted as Frank's eldest son Daniel "Danny" Reagan, a hard-nosed NYPD Detective and former Marine who often roughs up his suspects, despite being prohibited to do so.

[7] Bridget Moynahan portrays Frank's daughter Erin Reagan-Boyle, an assistant district attorney who abides by the law in her dealings with criminal justice.

[7] Len Cariou played Frank's father Henry Reagan, a retired police commissioner and former Marine who, like Danny, is very vocal about his political beliefs.

[19] In the United Kingdom, the series was among the weekly top five most viewed program on Sky Atlantic, amassing an audience between 450,000 and 630,000 viewers.

Hartel lauded Selleck, Wahlberg and Cariou's performances and the family dinners, noting that "the arguments and interruptions that garnish the meals give "Blue Bloods" its most human qualities."

Hartel also noted that the series "quickly resort to genre story staples", adding that the "identity crisis of cop drama versus family drama results in the former getting the short end of the stick with many cases feeling like an afterthought or plot contrivance for the Reagans to discuss at the weekly family dinner.

Stonebridge of The Numbers wrote, "The regular crimes are also intriguing enough to carry most episodes, although there were a few too many times where there were pretty big coincidences that strained credibility.

"[23] Chuck Barney of San Jose Mercury News found the cases on the series to "don't carry much of a wow factor" and the show overall lacked "the kind of grittiness that might make it more powerful."

Arseneau concluded about the season, "If we had genuinely solid material to engage the Reagans, Blue Bloods could be one of the best cop shows on television.

"[25] David Brown from Radio Times gave the season release three stars (out of five), writing "Imagine something that mixes the best elements of Law & Order and Brothers & Sisters and you get the idea.

"[26] The Guardian writer Michael Hann wrote negatively of the series, noting that "one can know what is happening without even watching the show, since each episode follows the same template.