Main •
William Fichtner as Louis Daniel (seasons 1–2), Major,
Direction Centrale de la Police Judiciaire /
International Criminal Court from France •
Gabriella Pession from Italy •
Elizabeth Mitchell as Carine Strand (season 3), Inspector, Senior Investigator of the International Criminal Court; former
Chicago Police Department officer from the United States •
Naomi Battrick as Ellie Delfont-Bogard (season 3), a recent forensic psychologist graduate, Metropolitan Police Service from the United Kingdom •
Stuart Martin as Luke Wilkinson (season 3), Inspector, Metropolitan Police Service from the United Kingdom
Recurring • Elsa Mollien as Rebecca Daniel (seasons 1–2),
International Criminal Court from France •
Klára Issová as Shari (seasons 1–2), a carnival worker from Netherlands •
Karel Roden as Lev Marianski (seasons 1–2), a Russian crime figure •
Kim Coates as Phillip Genovese (seasons 1–2), a convicted criminal and stalker from the United States •
Rossif Sutherland as Moreau (seasons 1–2), Lieutenant,
Prefecture of Police of Paris from France •
Florentine Lahme as Kathrin Eichholtz (seasons 1–2), Hauptkommissarin,
Berliner Polizei from Germany •
Marcel Iureș as Alexander Dimitrov (seasons 1–2), a gangland boss and drug dealer from Romania •
Ray Stevenson as Miles Lennon (season 2), Police Superintendent,
Scotland Yard from the United Kingdom •
Carrie-Anne Moss as Amanda Andrews (season 2), Detective,
NYPD from the United States •
Sophia Myles as Dr. Anna Clarke (season 2), a doctor from the United Kingdom •
Michelle Fairley as Sophie Baines (season 3), Prosecutor,
International Criminal Court from the United Kingdom ==Production==