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| Johannes Ring | Professor Helms |
| Johanne Krum-Hunderup | Professor Helms kone |
| Johanne Blom Fritz-Petersen | Alice, Helms' datter |
| Gerhard Jessen | Felix Warming, Alices' forlovede |
| Robert Schmidt | Hans Brandt, ingeniør |
| Frederik Buch | Morten Lee, matros |
| Ingeborg Bruhn-Bertelsen | Kitty, stuepige hos professoren |