The Nazi propaganda mastermind behind Hitler speaks in first person as actor Kenneth Branagh reads pages of the diary kept by the chief of propaganda, Joseph Goebbels, revealing the man's most inner thoughts.
| Actor | Role |
|---|---|
 Kenneth BranaghNarrator (voice) | Narrator (voice) |
 Joseph GoebbelsSelf (archival footage) | Self (archival footage) |
 Adolf HitlerSelf (archival footage) | Self (archival footage) |
 Hermann GöringSelf (archival footage) | Self (archival footage) |
 Leni RiefenstahlSelf (archival footage) | Self (archival footage) |
 Heinrich HimmlerSelf (archival footage) | Self (archival footage) |
 Winston ChurchillSelf (archival footage) | Self (archival footage) |