Jamie Dornan as Pat Quinlan

Guillaume Canet as Rene Faulques

Mark Strong as Conor Cruise O'Brien

Jason O'Mara as Sgt. Jack Prendergast

Michael McElhatton as General McEntee

Mikael Persbrandt as Dag Hammarskjold

Danny Sapani as Moise Tshombe

Fionn O'Shea as William Reidy

Fiona Glascott as Carmel Quinlan

Emmanuelle Seigner as Madame LaFontagne

Conor Quinlan as P.J. (Patrick Joyce)

Sam Keeley as Billy (Sniper) Ready

Conor MacNeill as Radio Operator

Luc Van Gunderbeeck as Charles de Gaulle

Jordan Mifsud as John Donnelly

Charlie Kelly as Walter Hegarty

Mike Noble as Charles Cooley

Ronan Raftery as John Gorman

Gérard Rudolf as Black Jack

Ashish Gangapersad as General Raja

Richard Lukunku as Patrice Lumumba

Andrew Stock as Man in White Suit

Thulasizwe Kubheka as Tshombe's Aide

Michael Richard as USSR Ambassador

Jonathan Holby as

Danny Keogh as

Charmaine Weir Smith as

Robert van de Coolwijk as

Mike Bodie as

Kyle Ryan Diffenthal as

Robert Hobbs as

Ashley Taylor as

Leon Clingman as

Garth Breytenbach as

Alexander Tops as