Samson

Serge Merlin

Jakub Gold

Alina Janowska

Lucyna

Elżbieta Kępińska

Kazia, Malina's Niece

Jan Ciecierski

Józef Malina

Tadeusz Bartosik

"Professor" Pankrat

Władysław Kowalski

Fiałka / Jakub Gold (voice)

Irena Netto

Jakub's Mother

Beata Tyszkiewicz

Stasia

Jan Ibel

Genio

Bogumił Antczak

Prisoner (uncredited)

Wiesława Chojkowska

Wiśka (uncredited)

Edmund Fetting

Zygmunt, Guest at Lucyna's Party (uncredited)