"Dexter" is an American crime drama starring Michael C Hall as Dexter Morgan, a blood spatter pattern analyst for the Miami Metro Police Department. He's the ultimate nice guy, who brings his co-workers doughnuts every morning, works hard, helps catch bad guys and will do anything to help his friends and family. He's also a serial killer. He was taught by his adoptive father, Harry (James Remar), to kill only those "who deserve it"; mainly other killers who have escaped the legal system or were never suspected in the first place. Based on Jeff Lindsay's novel Darkly Dreaming Dexter, the series follows the main protagonist as he balances his twin lives. One moment he's a devoted family man, spending his days preoccupied with case files and blood samples and helping his colleagues catch the bad guys. The next moment he's hunting down and punishing murderers and rapists, and trying to stay one step ahead of the law. In his narration, he often refers to "humans" as if he is not one of them. The supporting cast includes Jennifer Carpenter as Dexter's adoptive sister and co-worker. It premiered on FX in 2007. The first two series were shown in a late-night slot on ITV1.