Eamonn Flaherty made his first appearance 22 September 1997. He is portrayed by Maurice O'Donoghue.
Eamonn is unwelcoming to his long-lost relatives, and extremely loyal to his drunken father. He defends his father's bullying to his long-lost cousin Ian Beale, and they nearly come to blows because of this. According to the Kilmoneen hotelier, Patrick, Eamonn had been on the receiving end of his father's abuse as a child and was severely whipped with a belt for stealing chocolate. Patrick comments, "you don't break the commandments, not in Sean's house". Even though he is of aware of the potential repercussions, Eamonn informs his father that his niece Mary Flaherty has been having an affair with a married man, and Sean is furious. Maggie fears for her safety, so she sends her to London to live with Pauline.