Nina has been killed in a vampire attack and the gang now has to take care of baby Eve, whose werewolf heritage appears to have attracted the attention of vampire overlords known as the Old Ones. George dies while rescuing Eve, leaving her in the custody of Tom (who moves into Honolulu Heights) and Annie. Hal later turns up and becomes the new vampire at Honolulu Heights. Lawyer Nick Cutler, a vampire created by Hal in 1950, plans to expose werewolves as part of a larger plan involving a vampire conquest of Earth. Cutler tries to get Hal back to his old ways of drinking blood and eventually succeeds in breaking Hal down. The blood sends Hal into overdrive and he repulses Alex, whom he is dating, with his crude and unusual behaviour when they meet for a second date. Alex leaves angrily but is followed by one of Cutler's men. Meanwhile, Eve, from the future, reveals to Annie that in her future, most of humankind are dead or living in concentration camps and vampires now rule every inch of the world. Annie is shocked to learn that Hal is the ruthless leader of the new vampire revolution. To save the world, Eve asks Annie to kill her when she is a baby. Cutler reveals Alex's dead body drained of blood as revenge for Hal murdering his wife in similar fashion in 1950. Cutler then locks Hal up but Alex returns as a ghost and helps Hal escape. The Old Ones then arrive in Barry. To save the world Annie blows up Eve and The Old Ones, therefore saving the world, which is her unfinished business. The series ends with Hal, Alex and Tom living together in Honolulu Heights.

一個受保護的證人在轉(zhuǎn)移途中遭伏擊，三名在場警察被殺害，負責(zé)這次轉(zhuǎn)移的探長Lindsay Denton很快被懷疑串通罪犯，反貪組在調(diào)查Denton的同時，也在尋找真兇，但是事情似乎并不簡單……

在一次反恐行動中，由于情報失誤，英國特警部隊誤殺了一名懷抱孩子的中東移民，負責(zé)行動隊的首長決定將這宗丑聞徹底抹去，遂找來了知道真相的隊員們統(tǒng)一口徑，錄制假口供。刑偵隊長史蒂夫（馬丁·康普斯頓 Martin Compston 飾）對于首長的決定十分不滿，于是辭去了職務(wù)，被調(diào)往隸屬于英國反貪署的秘密行動組。史蒂夫的任務(wù)是調(diào)查一位名為托尼（連尼·詹姆斯 Lennie James 飾）的偵緝總督察，他因為涉嫌貪污而被列入了監(jiān)視的名單。史蒂夫和女警探凱特（薇琪·麥克盧爾 Vicky McClure 飾）一同打入了托尼所領(lǐng)導(dǎo)的小組內(nèi)部，史蒂夫卻意外的發(fā)現(xiàn)，凱特還有另外一重秘密的身份。