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Consternation at the faculty when professor Van der Weyden, who temporarily replaces professor T, is run over on his bike in a hit-and-run. Rumor has it that professor T is involved.
A successful mystery novelist has committed suicide. However, the police have their doubts, especially because the author has described his own death in one of his books.
A visitor is killed in a pensioners home by a resident suffering from dementia. It looks like an unfortunate accident, or does it? Meanwhile, Professor T. continues his investigation into his father's suicide.