Mark has put his father up in a small hotel until he finds better living quarters for him and even gives Sean some money out of his own pocket. But Sean spends all the money that Mark gives him on hard liquor and confines himself to his room doing nothing but drinking all day and night. However, another man is looking for Mark, someone that Sean fears. Mark's job has made him closer to Sofia Silvestri. Sofia is charmed by Mark: he seems genuinely interested in her. Sofia's friend, Emily, warns her to be careful being around Mark. But Sofia has other worries. Her father is encouraging Andrea to fight for her. But Sofia won't be forced. Meanwhile, Mark discovers a problem with the steel used to build the ship. But science is put to test by the divides in Belfast. The Protestant magnates, worried by the success of the Union, call in the Royal Army to boycott a peaceful march that Larkin organizes. The Army sabotages the march in the Catholic area, causing accidents that seem organised by Catholic workers. Mark is there to show his respect for the workers. Sofia is there with Emily and the McCann's younger brother, Conor, whom has bitter resentment against the British army since being discharged months earlier. To everybody's shock, innocent school teacher Walter Hill, Emily's husband, is killed by a soldier. Mark only just manages to rescue Sofia from the havoc. Andrea Valle is also wounded during the riot.

Original airdate on History Channel May 27, 2012