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A police computer expert is seconded to Belfast to track down the identity of an IRA mole.
Freddie Ross
Donal McCarthy
Chief Inspector Daisy Burke
Dermot Shea
Daniel Kent
Thomas Mallin
Eamon Duffy
Clare Barrett
Maureen Barrett
Sean Scanlon
Asst. Chief Con. Gilbert
Frank Gallagher
Dominic
Duggan
Mrs Duffy
Kathy Ross
Devlin
Jack
Padraig Redmond
Kevin Brady
