“What is the object of this circle of misery，and violence，and fear？It must have a purpose，or our universe has no meaning and that is unthinkable . But what purpose？That is humanity’s great problem for which reasons so far there's no answer”这是整个剧集的最后一段话，二刷完成了。以前看福尔摩斯，主要是着重缜密思维和神奇推理，然而更是人性弱点和丑恶的镜鉴，尤其是《讹诈庄家》《单身贵族》和这最后一集《硬纸盒子》表现得尤其明显。