Karel Höger as Kpt. Tůma

Josef Bek as Lieutenant Frantisek Líbal

Oldřich Nový as Jindrich Kraus, director of the hotel

Anna Pitašová as Kraus' wife called Isa

Bohuš Záhorský as Dr. Vopálenský

Jan Tříska as laboratory assistant Mirek Zach

Miloš Nedbal as magician Bonhardi (Ladislav Valenta)

Bohumil Šmída as thief Josef Sesták

Oldřich Velen as Lieutenant Jiri Florian

Marcela Martínková as laboratory assistant Zdena Fisárková

Josef Abrhám as witness Jirka Ruml

Libuše Geprtová as Ruml's girl

Rudolf Deyl as

Anna Gabrielová as Krystofová

Hana Brožová as Golf player

Miloslav Lipinský as Dancer

Věra Burešová as Dancer

Alena Martinovská as Dancer

Antonín Kandert as warehouseman Rendl

František Miroslav Doubrava as member of the VB

Ota Motyčka as Inspektor

František Hadrava as chief

Josef Hlinomaz as Receptionist

Bohumil Honsa as Porter

Marta Kaňovská as stranger

Eva Marie Kavanová as Golf player

Lubomír Kostelka as chief

František Kovářík as old Mr. Mensík

Věra Langrová as Receptionist

Václav Lohniský as Receptionist

Vilém Pruner as Waiter

Zdeněk Řehoř as Lokvenc

Sonja Sázavská as bartender Lenka

George Skalenakis as stranger

Otto Šimánek as Moravec

Zdeněk Týle as Lifftboy

Gustav Nezval as Chief of the VB

Věra Hanslíková as Woman at interrogation

Gabriela Bártlová-Buddeusová as Fikjzlová - woman at interrogation

Milka Balek-Brodská as Rezácová - woman at interrogation

Milena Geislerová as Stranger

Václav Wasserman as Guest at the hotel

Karel Peyr as Sochor - man at interrogation

Martin Vačkář as Pikolík