As violence escalates amongst malcontent workers, Pirrie begins negotiating with union leaders. Mark blows the whistle on Titanic's steel, quits his love affair with Kitty to pursue Sofia and takes an unexpected hit from Bernard Doyle.

Cast: Kevin Zegers, Alessandra Mastronardi, Derek Jacobi, Billy Carter, Massimo Ghini, Branwell Donaghey, Martin McCann, Ophelia Lovibond, Gray O'Brien, Ian McElhinney, Valentina Corti, Denise Gough, Jonathan Forbes, Edoardo Leo, Liam Cunningham