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.

Penn Badgley, Chace Crawford, Blake Lively
Seasons: 1-2
Network: The CW

Story: Darkly comic teen soap opera that revolves around the lives of socialite young adults growing up on New York's Upper East Side who attend elite academic institutions while dealing with sex, drugs, and other teenage issues.

Jonas Armstrong, Keith Allen, Sam Troughton
Seasons: 1-2
Network: BBC1

Story: Returning to England after years fighting in the Crusades, Robin of Locksley is shocked to find the sheriff is running Nottingham with an iron fist. Becoming an outlaw, he and his merry men set out to bring the sheriff down.