The opera diva Bianca Castafiore spends a few days with Tintin and his friends at Marlinspike Hall, where a mysterious theft is perpetrated.
| Actor | Role |
|---|---|
 Thierry WermuthTintin (voice) | Tintin (voice) |
 Christian PelissierHaddock (voice) | Haddock (voice) |
 Henri LabussièreTournesol (voice) | Tournesol (voice) |
 Michel RuhlNestor (voice) | Nestor (voice) |
 Marie VincentBianca Castafiore (voice) | Bianca Castafiore (voice) |
 Yves BarsacqDupont (voice) | Dupont (voice) |
 Jean-Pierre MoulinDupond (voice) | Dupond (voice) |
 Susan RomanMilou (voice) | Milou (voice) |