Celt 3, played by co-star Jack O'Connell, is a supporting character in "Nights in Ballygran". He attends the Order of Ancient Celts annual St. Patrick's Day dinner and gets involved in an argument about whether second generation Irish immigrants are as loyal to their homeland as first generation immigrants. As a second generation man he is defensive and brings up his fundraising prowess and mentions that Americans supply the weapons for the Irish revolution. The dinner is later broken up by Prohibition Agents.
|Season one appearances|
|Boardwalk Empire||The Ivory Tower||Broadway Limited||Anastasia|
|Nights in Ballygran||Family Limitation||Home||Hold Me in Paradise|
|Belle Femme||The Emerald City||Paris Green||A Return to Normalcy|