HolbyBlue is a British police drama series that aired on BBC One from 2007 to 2008. Produced by the BBC, Red Planet Pictures and Kudos for BBC One, it is a spin-off of the successful BBC One medical drama Holby City, itself a spin-off of the long-running series Casualty. All three programmes are set in the fictional city of Holby. HolbyBlue follows the professional and personal lives of police staff at Holby South police station. The first series of eight episodes was broadcast between May 8 and June 26, 2007. Broadcast of the first episode was postponed by a week. A second series of twelve episodes was broadcast between March 20 and June 5, 2008. The second series began with a Holby City crossover episode. The second series introduced three new characters into the series. The first series aired on Tuesday nights at 8 pm, in the regular Holby City timeslot. Holby City was moved to Thursdays for the duration of HolbyBlue 's run. The show moved to Thursday nights for the second season. The BBC announced in August 2008 that due to poor ratings, they had dropped the show and it would not be returning for a third series.