S1, E4: XIII follows the piece of information he learned from Sanchez in the Venezuelan prison. It leads him to Ireland in search of Seamus O’Neal, an ex-IRA operative who was inducted into the CIA at the same time XIII was. In Seamus’ home town, XIII begins to ask questions about Seamus and opens up old hostilities… and a possible connection between Seamus and a new breed of IRA killers. XIII must fight to find out what Seamus was involved in… and the secrets of what it has to do with XIII’s own life.