On screen
Cast
22 credited performers
Vladimír Ráž
Dr. Václav Pánek
Václav Voska
Dr. Vladimír Gajdos
Irena Kačírková
Dr. Lída Kafková
Rudolf Deyl
Sebek - captain of SNB
Artwork unavailable
Zora Polanová
Marie Bosáková - assistant
Jan Pivec
Driver Hába
Ladislav Pešek
Karel Chládek
Vladimír Hlavatý
Janitor
Jaroslav Marvan
Zouplna
Felix le Breux
Director
Miloš Nedbal
Ing. Karel Vlach
Ferdinand Krůta
Laboratory
Mirko Musil
Policeman
Artwork unavailable
Jan Maška
Investigator #1
Miloš Vavruška
Investigator #2
Artwork unavailable
Zdeněk Jelínek
Guest
Artwork unavailable
Karel Krautgartner
Musician
Artwork unavailable
Jiří Verberger
Hudebník-pianista
Artwork unavailable
Karel Turnovský
Drummer
Artwork unavailable
Adolf Šmíd
Trumpetista
Artwork unavailable
Josef Steigl
Character not listed
Artwork unavailable
Antonín Zíb
Commentary (voice)