In June 2011, it was announced that
Denis Leary and
Bob Fisher were developing an adaptation of the 2011 British comedy-drama
Sirens, created by Brian Fillis and inspired by
Tom Reynolds's book,
Blood, Sweat & Tea about the
London Ambulance Service. Leary stated that he would not star in the series, but would take a small role, if necessary, in the future. The four lead roles were filled in October 2012, with the casting of
Michael Mosley,
Kevin Daniels,
Kevin Bigley and
Jessica McNamee. Production for the pilot began in Chicago that month. The network announced that
Sirens would premiere in the first quarter of 2014 and would later state that two back-to-back episodes would air together on March 6, 2014, then resume normal programming the following week. At the January 2014
TCA conference, Leary and Fisher stated that the producers of the British series approached Leary's business partner,
Jim Serpico, and asked him to adapt it for the U.S.. Leary stated, "We really liked those guys, and USA [network] was pillaging the cast of [the recently ended]
Rescue Me and putting them into shows." He added, "we can make some money off these USA people." On June 11, 2014, USA ordered a 13-episode second season of
Sirens. ==Episodes==