太阳月亮一条河

这一季深入探讨了导演杰克与他之间错综复杂的关系；演员迪安、拉菲和阿诺德；音乐家罗马；还有服装设计师图阿。This season delves into the tangled relationships between Jack, the director; actors Dean, Raffy, and Arnold; Rome, the musician; and Tua, the costume designer.

1940年的伯明翰，在第二次世界大战的混乱中，汤米·谢尔比（基里安·墨菲 饰）从自我放逐中回归，直面着迄今为止最具破坏性的清算。家族和国家的未来岌岌可危，汤米必须面对自己心中的恶魔，并选择是直面它还是将其毁灭。

　　A drunken call of nature on a generator turns just another night out for Frank into a nightmare.
　　At hospital he's told that tests show he has a heart condition and may not make it to the weekend.
　　With these words ringing in his ears, he sets out to drink and drug himself into a stupor, only to be visited by his younger self and challenged to answer the question: "What is the point of Frank Gallagher?"
　　On one of his regular trips home from university, a little bit of Lip's other life makes an unwelcome appearance in Chatsworth, throwing Mandy into uproar and culminating in a knock-down, drag-out fight in The Jockey with shocking consequences.
　　Elsewhere on the estate, Lillian proves to be quite the madame when she settles on an unconventional way to turn her spare rooms into a little extra cash.

　　绰号“Laughing哥”的警员梁笑棠（谢天华 饰）成功完成卧底任务，并在CIB得到重任。但总管Harry（刘松仁 饰）和上司Jodie（陈法拉 饰），对他的操纵者之死有怀疑，在调查中发现其中另有隐情。在CIB招新后，Laughing和Jodie因训练理念不同，成 为一对欢喜冤家，互有胜负，各不相让。Harry在照顾患癌症的妻子之外，又要面对因他坐牢二十年刚出狱的前女友袁君岚，好在儿子Aidon舞技出众，又乐于助人，让他心安。为了对抗义兴，Laughing培植跛CoMichael（黄宗泽 饰）为线人，后者逐渐在帮派头马辣姜与威利争斗中获得重用，并脱离了Laughing的掌控，与昔日律师女友姚可可（徐子珊 饰）爱火重燃，并努力上位。随着帮派坐馆莫一烈的回归，一场警匪卧底之争、黑白人性缠斗愈演愈烈……