The Commanding Officer of an RAF Training School must deal with a difficult cadet, but the cadet reminds the C.O. of himself when young.
| Actor | Role |
|---|---|
 Ray MillandWing Commander Rudge | Wing Commander Rudge |
 Bernard LeeFlight Sergeant Harris | Flight Sergeant Harris |
 Kenneth HaighAnthony 'Tony' Winchester | Anthony 'Tony' Winchester |
 Kenneth FortescueJohn Fletcher | John Fletcher |
| SSean KellyCadet Day | Cadet Day |
 Helen CherryLouise Dawson | Louise Dawson |
 Anthony NewleyRoger Endicott | Roger Endicott |
 Leslie PhillipsBlake | Blake |
 John Le MesurierCommandant | Commandant |
 Richard WattisWilson | Wilson |
 Kynaston ReevesAir Minister | Air Minister |
| RRichard BennettCadet Phillips | Cadet Phillips |
| JJan BrooksDiana | Diana |
| MM.E. Clifton JamesField Marshal Montgomery (uncredited) | Field Marshal Montgomery (uncredited) |