The Time Traveler’s Confession New Amsterdam Mondays on Fox, 9 PM “Keep the Change” Written by John Mankiewicz Directed by Jim McKay Why is it that every homicide John Amsterdam investigates comes down to thwarted passion and/or love? Is this supposed to be some kind of theme for the series? Who has “themes” for police dramas? All these thwarted lovers and jealous spouses are experiencing a host of intense emotions that John apparently does not feel, or wants to feel, or somehow misses by inches. So he investigates the details, as if assembling the broken lives in a psychological jigsaw…