On most crime series, women are criminals, victims, or avenging investigators. Lately, though, some excellent shows offer heroines who are all three in one: women trapped between mobsters and law enforcement who are forced to collaborate with—and outwit—both sides. On Better, a British series on Hulu, Lou Slack (Leila Farzad) is a respected homicide detective who is secretly colluding with a major drug dealer. When she starts to lose his trust and that of her own colleagues on the force, Lou must manipulate both sides to save herself. —Alessandra Stanley