 Jamie DornanPat Quinlan | Pat Quinlan |
 Guillaume CanetRene Faulques | Rene Faulques |
 Mark StrongConor Cruise O'Brien | Conor Cruise O'Brien |
 Jason O'MaraSgt. Jack Prendergast | Sgt. Jack Prendergast |
 Michael McElhattonGeneral McEntee | General McEntee |
 Mikael PersbrandtDag Hammarskjold | Dag Hammarskjold |
 Danny SapaniMoise Tshombe | Moise Tshombe |
 Fionn O'SheaWilliam Reidy | William Reidy |
 Fiona GlascottCarmel Quinlan | Carmel Quinlan |
 Emmanuelle SeignerMadame LaFontagne | Madame LaFontagne |
| CConor QuinlanP.J. (Patrick Joyce) | P.J. (Patrick Joyce) |
 Sam KeeleyBilly (Sniper) Ready | Billy (Sniper) Ready |
 Conor MacNeillRadio Operator | Radio Operator |
 Luc Van GunderbeeckCharles de Gaulle | Charles de Gaulle |
 Jordan MifsudJohn Donnelly | John Donnelly |
 Charlie KellyWalter Hegarty | Walter Hegarty |
| MMike NobleCharles Cooley | Charles Cooley |
 Ronan RafteryJohn Gorman | John Gorman |
 Gérard RudolfBlack Jack | Black Jack |
 Ashish GangapersadGeneral Raja | General Raja |
 Richard LukunkuPatrice Lumumba | Patrice Lumumba |
| AAndrew StockMan in White Suit | Man in White Suit |
 Thulasizwe KubhekaTshombe's Aide | Tshombe's Aide |
 Michael RichardUSSR Ambassador | USSR Ambassador |
| JJonathan HolbyNot listed | Not listed |
 Danny KeoghNot listed | Not listed |
 Charmaine Weir-SmithNot listed | Not listed |
| RRobert van de CoolwijkNot listed | Not listed |
 Mike BodieNot listed | Not listed |
| KKyle Ryan DiffenthalNot listed | Not listed |
