由日本著名演员水谷丰与反町隆史主演的朝日电视台人气电视剧系列《相棒season16》于10月18日回归荧屏。
在上一季的季终集里，杉下右京（水谷丰饰）对身为搭档的冠城亘（反町隆史饰）非常罕见的发了脾气。而亘也不甘示弱，回敬了他一句“你算何方神圣”。本季是水谷丰与反町隆史搭档主演《相棒》系列的第三季。在全新一季的《相棒》中，这对搭档会擦出怎样的火花？他们的搭档关系又会发生怎样的变化？让我们拭目以待全新一季《相棒》的精彩故事！

A mysterious international crime organization makes a demand of 900 million yen from the Japanese government for the release of hostages. The group then targets a victory parade of a world sports game to commit indiscriminate terror.

前内阁情报调查室职员柾庸子（远山景织子饰）因涉嫌杀害IT富翁加西周明（石丸干二饰）而被拘留送检，在判决确定之前，柾庸子一直被关押在东京拘留所，但她的会面突然被禁止。感到可疑的特命系杉下右京（水谷丰饰）和冠城亘（反町隆史饰）开始调查后不久，内阁官房长官鹤田翁助（相岛一之饰）突然出现，并告知了震惊的事实，庸子在拘留所内自杀了。怀疑是冷酷残忍的鹤田“封口”的特命系，为了查明庸子死亡的真相而开始调查。同样对她的死感到疑问的原律师中乡都都子（织田梨沙饰）也开始独自行动，但不久发现事件中有比想象中更复杂的想法和阴谋。随后，发生了亘被逮捕的事态。@哦撸马

Yuri Saotome is a charismatic beautician who runs a major sports gym and aesthetic salon. Her older brother died in an accident just before his opportunity to achieve a gold medal at the Olympics, so she chose to marry a wrestling gold medalist. After giving birth to four children, she and her husband broke off their marriage, leaving Yuri to raise the kids by herself. With their excellent genes, three of them have been raised as possible candidates for the next Olympic games.

女子高生・初（堀）和哥哥・凌（間宮）以及妹妹・茜和父母住在一起。某日被住在同一间公寓的橘亮辉（清水）抓住了把柄，被亮辉无理的命令来回折腾。在这时，数年前搬走的竹马・小田切梓（板垣）回来了。初被梓一如以往守护着自己的样子自然地吸引，即使被亮辉不断从中阻碍，初还是同梓交往了，但其实梓怀有着不为人知的目的。此时，初也知道了凌的秘密…

Keiji Sawamura, a detective in the Kanagawa Prefectural Police Department, is transferred to the Criminal Division of the Harbor Police Station. Upon his arrival, he is immediately thrust into a case involving a burnt body discovered at Honmoku Pier.