Something sinister has come to the shores of Erin Island, unbeknownst to the quaint population of this sleepy fishing village resting somewhere off Ireland’s coast. First, some fishermen go missing. Then there is the rash of whale carcasses suddenly washing up on the beach. When the murders start, it’s up to two mismatched cops – an irresponsible alcoholic and his new partner, a by-the-book woman from the mainland – to protect the townsfolk from the giant, bloodsucking, tentacled aliens that prey upon them. Their only weapon, they discover, is booze. If they want to survive the creatures’ onslaught, everyone will have to get very, very drunk!

Danny and Frank, two bumbling pest exterminators, cross paths with the enigmatic Lien, a Taoist guardian hunting an ancient Chinese jiangshi in Dublin. Together they set out to deal with this menace the only way they know how: extermination.

• Episode 1: Gently Go Man Following the murder of his wife by notorious gangster Joe Webster, Inspector George Gently is pondering retirement. When he hears about a murder in Northumberland that sounds like Webster's handiwork, he delays his retirement to take on this one last case. Paired with local DS John Bacchus, he must track down Webster, while at the same time trying to deal with his headstrong young assistant and keep him on the straight and narrow. • Episode 2: The Burning Man After an unidentified badly burnt body is found near an RAF base, Gently works alongside Special Branch officers who suspect the victim was involved with the IRA. However, the discovery that a large cache of guns has gone missing turns the case into a hostage situation. • Episode 3: Bomber's Moon When the beaten body of wealthy German businessman Gunter Schmeikel is discovered in the harbour, Gently and Bacchus are forced to consider whether a barman's anti-German sentiments are a motive for murder. However, the case takes a sinister turn when a key witness to Schmeikel's death is revealed to be a killer trained by Army Special Forces.

A routine raid led by Emer Berry, a detective in the Irish Criminal Assets Bureau, reveals that a small-time drug dealer has been receiving substantial funding from a seemingly untraceable source – not in cash, but in rough diamonds. When these diamonds are linked to a series of bombings in Belgium, Emer is forced to work with Police Commissioner Christian De Jong.

Jimmy Rabbitte, just a thick-ya out of school, gets a brilliant idea: to put a soul band together in Barrytown, his slum home in north Dublin. First he needs musicians and singers: things slowly start to click when he finds three fine-voiced females virtually in his back yard, a lead singer (Deco) at a wedding, and, responding to his ad, an aging trumpet player, Joey "The Lips" Fagan.