Love/Hate returns to RTÉ One on Sunday October 6 at 9:30pm, and you can find out what's in store and see new cast shots from the series on RTÉ TEN.
Warning: spoiler alert!
The makers of the show say: "Series 4 begins with Nidge (Tom Vaughan-Lawlor) and the gang trying to survive in the endless recession that dogs the rotten Republic.
"Nidge has his hooks into a client who has fallen behind on his tab at the brothel, and sees an opportunity to extort him into helping to import a large consignment of drugs.
"But unknown to the gang, his activities have attracted the attention of the Gardaí in the form of a semi-autonomous squad of secret undercover operatives, headed by Detective Inspector Mick Moynihan (Brían F O'Byrne). Cool, steely and manipulative, he is determined to bring Nidge down, and his unit employs an array of complex surveillance, mind games and dirty tricks against his target.
"As an increasingly paranoid Nidge works to put together the deal of a lifetime, he's unaware that Moynihan and his team are watching his every move..."
Tom Vaughan-Lawlor as Nidge
Brían F O'Byrne as Detective Inspector Mick Moynihan
Peter Coonan as Fran
Aoibhinn McGinnity as Trish
Charlie Murphy as Siobhán
Caoilfhionn Dunne as Lizzie
Susan Loughnane as Debbie
Mark Dunne as Ado
Laurence Kinlan as Elmo
Aaron Heffernan as Gavin