(Passo falso)
A scientist kills his rival with a perfect alibi and tries to get away with it.
Giuseppe Pagliarini
Ispettore Gates
Giuseppe Caldani
George Appleby
Carlo Alighiero
Sergente May
Mario Ferrari
Signor Prescott
Romolo Costa
Professor Prothers
Luisa Rivelli
Helen Webster
Loris Gafforio
Eldridge
