Nidge coerces his dentist into cooperating with him, unaware that Detective Inspector Moynihan is setting up a complex undercover operation to track and ultimately bring him down.

The episode was rated 7.87 from 84 votes.

Nidge sets out to persuade Dano he had nothing to do with his father's disappearance. Realising that a scapegoat needs to be found, he turns once more to Darren for help. Meanwhile, Siobhan struggles to cope with recent events.

The episode was rated 7.88 from 88 votes.

The gang come back from Nidge’s stag party in Prague to learn that Jimmy Byrne is back in town. His friends think Darren should kill him as soon as, but Darren’s not so sure. Tension mounts as Darren needs to make decisions not only about whether to follow through on his suspicions, but about what he should do about his feelings for childhood sweetheart Rosie. As Darren grows closer to uncovering the truth, tensions and suspicions rise among the gang. Darren in particular faces difficult decisions about his feelings for Rosie, his future and his loyalties.

The episode was rated 7.88 from 97 votes.

With Pauley's help, Nidge is back in business and arrangements are made for the first shipment under the new deal. Meanwhile Moynihan wrestles with a labyrinthine Garda bureaucracy.

The episode was rated 7.88 from 83 votes.

Nidge struggles to remain on good terms with Dano, as his web of lies and excuses threatens to unravel. Siobhan confides in her friend Donna - but it is only a matter of time before the secret gets out

The episode was rated 7.90 from 87 votes.

As Nidge and Trish’s wedding day arrives, gangwar is breaking out. John Boy and Hughie generate new plans and new recruits. Who will be with them? Darren is worried about John Boy and Hughie’s volatility, not just for himself but for his sister Mary and the kids. Relations between John Boy and Darren come to a head. Darren decides that it is in everyone’s interest that he heads for London. Can he end the war before he leaves?

The episode was rated 7.93 from 99 votes.

Moynihan's surveillance operation closes in on Nidge and Andrew's dummy run bringing in a shipment of mixing agent, while Fran plots a gruesome revenge.

The episode was rated 7.96 from 80 votes.

Donna reports Siobhan's rape to the police. Detectives ascertain what happened to Git and prepare to swoop to arrest the gang. It seems only a matter of time before Dano will discover the truth, so Nidge struggles to hold everything together, while tensions between him and an increasingly volatile Darren break out into open conflict

The episode was rated 8.03 from 87 votes.

Fran, still afraid that he could go down for the tiger kidnapping, lashes out looking for someone to blame. Resulting in a serious challenge to Nidge's authority.

The episode was rated 8.03 from 86 votes.

Nidge hides out in a dingy hotel, contemplating a new life in Spain, but knows it is only a matter of time before Dano and his gang catch up with him. As he sets off for a final showdown, wondering if the pair can reach a deal, a series of betrayals is about to be set in motion.

The episode was rated 8.08 from 89 votes.

Pressure builds on Nidge as the leaders of Dano's organisation send an inquisitor down from the north to thwart him, and matters only get worse as his lies start to catch up with him.

The episode was rated 8.08 from 88 votes.

As the shipment of drugs arrives at Dublin port, the deadly game of cat and mouse between Nidge and Moynihan reaches its climax.

The episode was rated 8.12 from 76 votes.

In the aftermath of Pauley's death Siobhan must face her most terrifying opponent yet as Terence May flies in from Spain to lay his nephew to rest - and to find the truth.

The episode was rated 8.16 from 89 votes.

Nidge uses Scotty as a driver on a new job, while Siobhan learns Tommy will soon wake from his coma and finds herself caught between her quest for revenge and her love for Pauley.

The episode was rated 8.25 from 93 votes.

Nidge is summoned back to Spain, where Terence demands a terrible price for his continued support, while Siobhan and Moynihan reach an unholy deal of their own.

The episode was rated 8.32 from 92 votes.