Inspired by Churchill's Dunkirk speech, brash, undisciplined Canadian bush pilot Brian MacLean and three friends enlist in the RCAF.
| Actor | Role |
|---|---|
 James CagneyBrian MacLean | Brian MacLean |
 Dennis MorganJohnny Dutton | Johnny Dutton |
 Brenda MarshallEmily Foster | Emily Foster |
 Alan HaleTiny Murphy | Tiny Murphy |
 George TobiasBlimp Lebec | Blimp Lebec |
 Reginald GardinerScrounger Harris | Scrounger Harris |
 W.A. BishopHimself | Himself |
 Reginald DennyCommanding Officer | Commanding Officer |
 Russell ArmsPrentiss | Prentiss |
 Paul CavanaghGroup Captain | Group Captain |
 Clem BevansStore-Teeth Morrison | Store-Teeth Morrison |
 J.M. KerriganFoster | Foster |
 J. Farrell MacDonaldDr. Neville | Dr. Neville |
 Patrick O'MooreFyffe | Fyffe |
 Morton LowryCarmichael | Carmichael |
| OOwen Cathcart-JonesChief Flying Instructor | Chief Flying Instructor |
 Frederick WorlockPresident of Court Martial | President of Court Martial |
 Roland DrewOfficer | Officer |
 Lucia CarrollBlonde | Blonde |
 George MeekerPlayboy | Playboy |
 Pat FlahertyDrill Sergeant (uncredited) | Drill Sergeant (uncredited) |
 Winifred HarrisRed Cross Collector (uncredited) | Red Cross Collector (uncredited) |