Michael C. Hall, Jennifer Carpenter, Julie Benz
Seasons: 1-3
Network: Showtime

Story: Dexter Morgan works for the Miami Metro Police Department as a blood pattern analyst. That's just his day job, at night he's a serial killer who goes around killing off some of societies less desirable elements.

Douglas Henshall, James Murray, Hannah Spearitt
Seasons: 1-2
Network: ITV

Story: A team of scientists investigate time anomalies and must deal with the prehistoric and future creatures that travel through to the present. Not helping is that the team leader's ex-wife has an agenda all her own.

Robson Green, Simone Lahbib, Hermione Norris
Seasons: 1-6
Network: ITV

Story: Centers on Dr. Tony Hill, a clinical psychologist who is able to tap into his own dark side to get inside the heads of serial killers. Working with vice squad detectives, Hill takes on tough and seemingly impenetrable cases.