Fair City fans discovered why newcomer Síofra is in Carrigstown during Sunday’s episode on RTÉ One and the RTÉ Player.

Síofra, played by Nancy Collins, has been making friends and asking questions in recent months.

She is also working for JJ Nash (Brian Doherty) in the bookies’.

Fans discovered on Sunday that Síofra is an undercover garda – the mole that JJ is so intent on finding in his circle.

DI Buckley talked to a mystery figure in Sunday's episode, who was then revealed to be Síofra

All was revealed when Síofra visited DI Buckley (Aiden O’Hare) in his office.

She updated him on her undercover operation, telling him that JJ is still unaware of her true identity – and that his paranoia may soon lead him to make a mistake.

Síofra looks at the evidence against JJ Nash

Fans can watch what happens next on Tuesday on RTÉ One and the RTÉ Player at 8:00pm.

Fair City airs on RTÉ One and the RTÉ Player on Sundays, Tuesdays, Thursdays, and Fridays.

Síofra discusses the case with DI Buckley

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