Celt 1, played by co-star John Joseph Gallagher, is a supporting character in "Nights in Ballygran". He attends the Order of Ancient Celts annual St. Patrick's Day dinner. He heckles Eli Thompson during his speech. He points out when Eli makes a mistake when listing the names of revolutionaries. He then gets involved in an argument about whether second generation Irish immigrants are as loyal to their homeland as first generation immigrants. Later he complains about the absence of green beer saying that it is tradition. 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|