

Count de Faber is working on a new type of explosive, but finds out that Professor Plussman has beat him to it. After an unsuccessful attempt to acquire the formula from Plussman, he breaks into the professor's house, steals the formula, and kidnaps his daughter, Mary. He takes her to Carlsten Fortress.
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Cast

Nils Olaf Chrisander
Greve de Faber - Sprängämnesexpert

Maja Cassel
Mary Plussman

Manne Göthson
C.J. Plussman - Professor

Arvid Hammarlund
Doctor Johnson

Gustaf Bengtsson
De Fabers medhjälpare i båten / Medhjälpare på Karlstens fästning

Victor Arfvidson
Berger - Fästningsförvaltare

Lilly Cronwin
Ung dam som ringer polisen

Frans Oskar Öberg
De Fabers utländska kompanjon
Anna Löfström
Äldre dam som ringer polisen

Siri Lundin
Professor Plussmans tjänsteflicka

William Engeström
Fiskaren

Hugo Björne
student
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