Person Of Interest: The man in the suit.

Person Of Interest is three different genre shows stuck together. For Detectives Carter and Fusco it's a police procedural drama, whereas John Reese lives in a spy thriller and Harold Finch's story is gradually edging towards being a full-on dystopian cyberpunk sci-fi. Overall it's marketed as a crime show, more or less, which is what it mostly looks like on the outside. Like the majority of characters in procedural cop shows Carter and Fusco have very boring dress-sense, for practical and professional reasons. In costume design terms, the real interest lies with Finch and Reese.
Before I even saw the show, Reese had been described to me as a man who wears his clothes like a uniform. When he first appears he has nothing: no home, presumably no money, no real identity... until Finch comes along and sets him up with his very own apartment and a wardrobe full of identical black suits. Mysterious benefactors are a popular theme in fiction -- who doesn't wish a nameless billionaire would show up and randomly gift you with a new house? -- but Person Of Interest has a refreshing way of tackling the subject. Rather than twisting himself up in knots about receiving so much help from a total stranger, Reese just takes it.