《摩斯探长前传》第四季于2017年1月回归ITV，本季共四集，标题分别为《游戏》、《圣歌》、《检疫》、《丰收》。剧情以1967年为背景，承接第三季结尾，由Shaun Evans和Roger Allam主演，Russell Lewis担任编剧，摩斯探长系列小说作者Colin Dexter担任顾问。
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