"Only Murders in the Building" is ostensibly a murder mystery, and it's clearly a love letter to Hitchcock's "Rear Window" (especially in the opening credits). But, at its core, the series is a portrait of Manhattan, and it shows (gracefully) how a big residential building can behave like a small town. A main figure in the current season is Bunny, who has been murdered. In life, Bunny was a grouchy co-op president, difficult to talk to, but committed to the common good. ("Do you have a permit to sell that merchandise in my courtyard?") Bunny is the sort of boss you affectionately mock; when you're scolded, you shiver with pleasure and say, "I've just been bunny'd!" Nearby Bunny's former space is Amy Schumer, playing Amy Schumer. In the series, Ms. Schumer is a vampiric, status-crazed narcissist. ("We all have to learn by doing....That's how I mastered stand-up comedy...in one day. It took me one day....I was also...