Professor Charles Buisson
Michel Simon
Professor Charles Buisson

Professor Charles Buisson, astronomer and Nobel Prize winner, has just discovered a nova. He informs the other observatories by telephone. Just as he thinks one of them is calling back, he finds himself on the line with a young woman threatening suicide at the Ruban Bleu cabaret, if her lover hasn't joined her by midnight. Intrigued, the professor decides to go and prevent the unfortunate woman from committing suicide. One of his students, who earns her living as an understudy in a knife act, helps him in his investigation, while the school principal and a policeman suspect him of being a prankster or even of selling drugs. For the scientist, it's an opportunity to discover a world of music-hall that he'd never known before: "I thought I knew the sky chart by heart, but there's one planet that was totally unknown to me: Earth. I'll be back!
Professor Charles Buisson
Michel Simon
Professor Charles Buisson
Gisèle, student of Buisson
Brigitte Auber
Gisèle, student of Buisson
Lucien Mosca, boss of Ruban Bleu
Henri Génès
Lucien Mosca, boss of Ruban Bleu
Mrs. Rédéri
Germaine Kerjean
Mrs. Rédéri
The determined trafficker
Anne Campion
The determined trafficker
Pierre-Dominique, aka 'Pépé'
Philippe Mareuil
Pierre-Dominique, aka 'Pépé'
Maurice, Buisson's assistant
Robert Lombard
Maurice, Buisson's assistant
Patrice
Georges Galley
Patrice
Mrs. Buisson
Suzanne Norbert
Mrs. Buisson
Henriette, washroom attendant
Gaby Basset
Henriette, washroom attendant
The indecisive snob
Micheline Dax
The indecisive snob
Russian Princess
Leila Lampi
Russian Princess
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