Richie Smyth Director Jamie Dornan Pat Quinlan Actor Mark Strong Actor Jason O'Mara Sgt. Jack Prendergast Actor Mikael Persbrandt Dag Hammarskjold Actor Guillaume Canet Actor Sam Keeley Actor Michael McElhatton McEntee Actor Fiona Glascott Carmel Quinlan Actor Ronan Raftery Gorman Actor Charlie Kelly Sgt Hegarty Actor Conor MacNeill Radio Operator Actor Kevin Brodbin Screenwriter Johanna Hogan Executive Producer Justin Moore-Lewy Executive Producer Alan Moloney Producer Joseph Trapanese Original Music Nikolaus Summerer Cinematographer Alex Mackie Film Editing Amy Hubbard Casting Christa Schamberger Casting Anita Van Hemert Art Director