Felix McClure, an Oxford University professor, is stabbed to death in his college study. Not only was he an expert in his field but he was one of the University's key fund-raisers. The investigation focuses on Brooks, a one-time cleaner for McClure who quit his college job abruptly after a student, Mathew Rodway, jumped out of a college window high on drugs. When Morse learns that Brooks' daughter was the object of affection for both Rodway and another student, he has another possible suspect. Brooks' wife also worked for one of McClure's friends and Morse uncovers a conspiracy that he may not be able to prove.
善意的犯罪，也是犯罪啊，可惜主谋安排的太好了，而且死无对证，摩斯都没办法，但案中案倒是挺有趣的
这季幕后女boss聪明，摩斯碰到了对手，吃了个哑巴亏案件相关男性有2种，一种色中饿鬼，一种家暴男…看得拳头硬了
这就一集，但这次剧情很紧凑，很有感觉
摩斯探长第一季至今的唯一一起完美犯罪，比较有趣的是刘易斯在本季之中所持的态度，践行正义是警察的职责所在，对于不言自明的凶手就这样因为没有证据放过，自然心有不甘，加上在本集之中出现了因财政困难裁员的背景，更加凸现路易斯的不妥协的职业态度，与已经探案多年的摩斯再次形成对比和分歧，这让人不得不更加期待刘易斯独立探案时的风采。
图南字幕组的翻译一季比一季差，看英文字幕才把犯罪手法看懂