on September 19, 2011 and Region 4 on September 15, 2011. Production The first season of Blue Bloods was produced by Panda Productions, Paw In Your Face Productions and CBS Productions. The series aired in the United States on CBS Friday nights at 10:00 P.M. EST and Canada on CTV via simulcast. Internationally, season one aired in New Zealand on TV3 Saturday nights at 9:30 P.M., in Australia on Network Ten for the first twelve episodes (Wednesday nights at 8:30 P.M. for the first six and Friday nights at 9:30 P.M.) and on One for the rest of the season. In a deal with CBS Studios International, the series was acquired by the UK channel Sky Atlantic on January 5, 2011 and was one of the first series to air on the new channel, which launched on February 1, 2011. The series was created by Mitchell Burgess and Robin Green and executive produced by Burgess, Green, producer Leonard Goldberg and director Michael Cuesta. The show was initially run by director Ken Sanzel, but Sanzel left in August 2010 amid alleged creative tension with series star Tom Selleck. 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. Episodes were written by a team of writers, which consisted of Burgess, Green, Brian Burns, Siobhan Byrne-O'Connor, Amanda Green, Julie Hébert, Thomas Kelly, Gwendolyn M. Parker, Mark Rosner, Ken Sanzel, Diana Son, and Kevin Wade. Cinematographers hired for the season included Craig DiBona, David Insley, Tim Ives and Teodoro Maniaci. Composers Mark Morgan and Rob Simonsen provided the background music for the season. Cast The first season featured a cast of five main actors who received star billing. Tom Selleck portrays Francis "Frank" Reagan, the patriarch of the Reagan family, a former Marine, and current Police Commissioner who is notably silent about his political beliefs. 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. Bridget Moynahan portrays Frank's daughter Erin Reagan-Boyle, an assistant district attorney who abides by the law in her dealings with criminal justice. Will Estes portrayed Frank's youngest son Jamison "Jamie" Reagan, a rookie police officer and graduate from Harvard Law before entering the police academy. Len