Jeffrey Dean Morgan as Jacob Kanon

Famke Janssen as Valerie Kanon

Cush Jumbo as Dessie Lombard

Joachim Król as Inspector Klaus Bublitz

Steven Mackintosh as Detective Inspector Rupert Pierce

Naomi Battrick as Marina Haysmith / Sylvia Randolph

Ruairí O'Connor as Simon Haysmith / Mac Randolph

Denis O'Hare as Simon Haysmith

Eva Röse as Detective Sergeant Agneta Hoglund

Lukas Loughran as Detective Evert Ridderwall

Dylan Devonald Smith as Pieter Holl

Sallie Harmsen as Nienke Holl

Orla O'Rourke as Nancy

Christopher Pizzey as Charles Hardwick

Tim Ahern as Bill Brown

Martin Wenner as Matts

Caroline Bartholdson as Female Detective

Daniel Sjöberg as Male Detective

Dana Blacklake as Young Helsinki Reporter

Celine Abrahams as Airline Representative

Leander Vyvey as Detective Hunziker

Ben Vinnicombe as José Fernández

Rose Etherington as Young Sylvia

Jack Wheatley as Young Mac

Lisen Rosell as Tilda

Dionne Hernemar as Jihan

Anna Jones as Sky News Reporter

Maryam Grace as Kimberley Stevensen - London Murder Victim

Ryan O'Sullivan as Thomas Stevensen - London Murder Victim

Rory Bray as Anthony Santos - Madrid Murder Victim

Clare Neave as Donna Santos - Madrid Murder Victim

Alex Field as Munich Murder Victim #1

Tashienna Bookal as Munich Murder Victim #2

Marcus St. Cyr as Johannas Meltz - Belgium Murder Victim

Ryan Hannaford as Andrin Rinker - Belgium Murder Victim

Alex Joseph as Zeeburg Murder Victim #1

Effie Digbori as Zeeburg Murder Victim #2

Joacim Landin as Police Officer / S.W.A.T. (uncredited)

Mattias Ng as Swedish Police Officer (uncredited)

Sofia Perlgård as Swedish Police Officer (uncredited)

Christian Jarder as Man in Park