An Irish detective stumbles upon some valuables that might be connected to a terrorist plot.
With the discovery that another bombing is imminent, Emer and Christian's attention is drawn to a well-known Irish businessman with a very chequered past.
Rough diamonds are found in Fionn's offices; Emer links this evidence to the bombings and warns Fionn that his life is in danger; Christian discovers that one of Sana's friends has been beaten by a fellow officer.
A year after the bombings, Trestford boss Richard Melnick dies in Antwerp, and CTU's Christian de Jong remains under investigation for shooting Luca Rivera; in Ireland, Bibi Brannigan makes an offer to CAB, now led by DS Claire Wallace.
Bibi reveals that Richard orchestrated the bombings as a ploy to get Deputy PM Viktor Maes into power and buy the Antwerp port; using her statement, CTU draw a link to additional operatives, but Bibi has even more shocking intel to share.
Maes intercedes with the mayor to help Frances Swann, Trestford's new head, but backs out when a journalist approaches Swann's rival about the port deal; CTU learns Richard's cause of death, and Bibi lands in the crosshairs of an assassin.
Angeline Ball
DS Emer Berry
Simone Kirby
Bibi Melnick
Peter Coonan
Fionn Brannigan
Charlie Carrick
James Melnick
Wouter Hendrickx
Christian De Jong