Ty, co w Ostrej świecisz Bramie

Ryszard Malewicz, a young inventor, is out of work. He had been waiting for months for a response from the ministry to which he had sent plans for his invention, an explosive of extraordinary power. Desperate Ryszard is comforted by his mother and his fiancée Maria.

• Jan Nowina-PrzybylskiDirector
• Tadeusz KończycWriter
• Wiktor KrupinskiOriginal Music Composer
• Jan MaklakiewiczOriginal Music Composer

• Mieczysław CybulskiRyszard Malevich, Maria's fiancé
• Maria BogdaMaria
• Lena ŻelichowskaIrma, a member of the gang
• Tekla TrapszoRyszard's Mother
• Kazimierz Junosza-StepowskiThe Baron, head of the gang
• Artur Socha"Engineer", member of the gang
• Stanisław SielańskiKwiatek, the Baron's mute servant, member of the gang
• Feliks SzczepańskiStefan, Ryszard's Friend
• Nina SwierczewskaJulia, the Malevichs' maid
• Jan KurnakowiczJóziuk
• Helena BuczyńskaPetronela, the Malevichs' housekeeper
• Wanda JarszewskaPassenger on the train