Featured Characters: Destroyer (Keen Marlow) (Main story and flashback) (First appearance) Supporting Characters: Professor Eric Schmitt (First appearance; dies) Antagonists: Nazis Gestapo Frederick von Banger (First appearance) Sturmabteilung (First appearance) Numerous unnamed soldiers Other Characters: Unidentified News Company (Only in flashback) Keen Marlow's Editor (Only in flashback) Two unnamed employees (Only in flashback) Numerous unnamed prisoners Races and Species: Humans (Main story