- Composer:
- Ludwig van Beethoven.
- English words:
- Edward J. Dent.
- Producer:
- Stanford Robinson
- Narration written and spoken by:
- Dennis Arundell
- Conductor:
- Sir Adrian Boult
- Marcelline, the jailer's daughter:
- Doris Gambell
- Leonora, under the name of Fidelio, sung by:
- Laelia Finneberg
- Leonora, under the name of Fidelio, played by:
- Dorothy Black
- Florestan, her husband, a state prisoner, sung by:
- Frank Titterton
- Florestan, her husband, a state prisoner, played by:
- Guy Vemey
- Jaquino, porter of the prison:
- Jan van Der Gucht
- Pizarro, Governor of the prison, sung by:
- Roderick Lloyd
- Pizarro, Governor of the prison, played by:
- Leo De Pokorny
- Fernando, the Minister:
- William Parsons
- Rocco, the jailer:
- Harry Brindle
