Thursday, 7.30pm, Crime and Investigation Network ‘‘ Keeping the peace in this troppo town requires a special breed of cop,’’ the narrator intones about policing Darwin. As presented, the city’s police are a combination of social workers and protectors of the vulnerable, in most cases needing protection from their own inebriation. From indigenous Australians to Irish tourists and sundry drunks and deadbeats of all ethnicities, Darwin is just awash with drink, drunks and the mayhem that follows both. In this week’s episode, a policewoman tries to help a woman at risk of a beating from a drunken partner. A sniffer dog picks out perhaps the world’s dumbest drug runner. And a pair of police try to help the victim of a domestic. Yes, it’s all from the police point of view, there is no mention of cases of people dying for want of care in custody and the cops in the show are presented as endlessly patient and sympathetic to the drunks and dills they meet on the street. But if there is a case for a dry Darwin, this show makes it.