- Translated and adapted for broadcasting by/Narrator:
- Clemence Dane
- Music composed by:
- Richard Addinsell
- Music played by:
- A section of the London Symphony Orchestra
- Conductor:
- John Hollingsworth
- Producer:
- Val Gielgud
- Franz, the Duke of Reichstadt, Napoleon's son:
- Marius Goring
- Flambeau, a French Grenadier:
- Arthur Young
- Metternich, the Chancellor of Austria:
- Leon Quartermaine
- Francis, Emperor of Austria:
- Victor Rietty
- Prokesch, the Duke's personal friend:
- David Peel
- Tiburce de Lorget, an exile in Austrian pay:
- Donald Pleasence
- Count Dietrichstein, the Duke's tutor:
- Raf de la Torre
- Baron d'Obenaus, the Duke's history tutor:
- Howieson Culff
- Count Bombelles, in attendance on Marie Louise:
- Norman Mitchell
- General Hartmann, in attendance on the Duke:
- Richard Williams
- Count Sedlinsky, Chief of the Austrian Police:
- Reginald Thorne
- Marie Louise, Duchess of Parma, Napoleon's wife:
- Rachel Gurney
- Countess Camerata, Napoleon's niece:
- Grizelda Hervey
- Therese de Lorget, Tiburce's sister:
- Elisabeth London
- Fanny Elssler, a dancer:
- Diana Wilding
- The Archduchess, Marie Louise's sister:
- Joan Hart
- Other parts played by:
- Arthur Ridley
- Other parts played by:
- Henry Oscar
- Other parts played by:
- Eric Anderson
- Other parts played by:
- Preston Lockwood
- Other parts played by:
- Eric Lugg
- Other parts played by:
- Dorothy Smith
- Other parts played by:
- Duncan McIntyre
- Other parts played by:
- Antony Kearey
- Other parts played by:
- Wyndham Milligan
- Other parts played by:
- Virginia Winter
- Other parts played by:
- David Stevens
- Other parts played by:
- Seymour Green
