来自大陆的杀手李强（周润发 饰）只身来到了美国，为了将还在家乡的母亲和妹妹接来美国一家团聚，无奈之下他只好向纽约曼哈顿唐人街的黑帮老大魏先生借钱。此时，魏先生的儿子因为在毒品交易中逃避警察而意外坠楼身亡，李强正好成了魏先生复仇的棋子。 李强被派去杀害执行这次缉毒行动的负责人斯坦警官和他的家人，当他发现斯坦警官的儿子年仅7岁时，对家人的牵挂令他怎么也下不了手。行动失败后，不仅李强的生命受到了威胁，连他原在大陆的家人也面临杀身之祸。为了逃回家乡拯救家人，李强和魏先生派来的杀手展开了一场角力！
明嘉靖三十七年，宦官权倾朝野。方术国师为谄媚监首厂公，提出以“活虎心”炼丹，用以“壮阳重生”。故东厂在猛虎出没地——西南边陲小镇设立“司礼猎场”，猎捕猛虎用以炼化。但没有想到，此举使得奇异病毒进入老虎体内，让老虎发狂，并形成瘟疫迅速传播......
Petty Officer Michael Davis (Jeremy Davis) is the newbie to SEAL Team VI, but after his first mission the young soldier is weathered beyond hid years. His first assignment as for the elite black ops squad is as Communications Officer for the micro ground assault team that enabled surgical aerial assaults of strategic targets in Iraq, priming allied forces for the what is now known as Operation Desert Storm. The honor of being part of the special forces unit is enriched by the fact that he is invited into the unit lead by the best, Master Chief Devon Mackefy (Ken Gamble). The team, having just returned from one mission, is called into duty once again, because “Mac is the best”. Feeling the pull of the call, and given no option by the powers that be, our heroes go into the thick of it with the usual disadvantages - tired, short by one man and in need of gearing up in the weapons department; all with their invisibility being paramount. The team is rounded out by Petty Officer Williams (Kristoffer Garrison), Petty Officer Sanchez (Neta De Paula) and Chief Petty Officer Roberts (Zach McGowan). The team’s only contact ii Iraqi is Jamal (Amol Shah), a Kurd who has lost his family to the war and now helps the U.S. in these isolated covert operations. Their sole mission mark aerial targets, avoid capture and stay alive for four days. But the enemy is in every direction. Tensions are high since Davis is untested in the field and Mac is distracted by a recent personal loss. All these complications threaten the success of the mission, as well as the team’s survival.
2015年にシーズン1が放送され、6年目を迎えた本シリーズ。東山演じる天樹悠を中心に、個性あふれる刑事たちが超凶悪犯罪や難解な未解決事件に挑むさまが描かれる。