THE garda who took a starring role in 'Love/Hate' gave up undercover work as long ago as last February, it has emerged.
Detective Garda Kieran O'Reilly made his debut as Nidge's new nemesis, Ciaran Madden, on Sunday night.
But Garda Commissioner Martin Callinan has ordered an internal inquiry.
However, it has emerged that Det Gda O'Reilly quit any undercover work about eight months ago.
One source said: "There has been a misinterpretation that Kieran still has an ambition to be an undercover on the streets. That's not true. He took himself off that duty last February, around the time 'Love/Hate' was about to be filmed."
The Irish Independent can also reveal that Det Gda O'Reilly was previously a member of a so-called 'mockie' squad, which is street-slang for mock junkies. Their role was to infiltrate the local drug scene.
Meanwhile, Mr Callinan is set to receive a report that will determine whether Det Gda O'Reilly should undergo a full disciplinary investigation.
He said that his role in the RTE drama had raised issues that needed to be addressed.