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Every evening is as random as the next, death doesn't follow a schedule.
— Det. John Munch · Homicide: Life on the Street
Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Nights don't come with a pattern, and neither does death. This says you can't count on tomorrow evening resembling today's, because mortality ignores any timetable. The joke-like phrasing, 'every evening is as random as the next', makes unpredictability the only reliable thing about it.
Context reviewed