Milan Lasica as A (extra-terrestrial 1)

Július Satinský as B (extra-terrestrial 2)

Jiří Menzel as Dr. Jánský

Naďa Konvalinková as Jiřinka

Miloš Kopecký as Prof. Horowitz

Luděk Sobota as Vanerka

Jiří Lábus as

Jana Břežková as

Jaroslava Kretschmerová as

Luděk Kopřiva as

Karel Augusta as

Jiří Hálek as

Vladimír Hlavatý as

Jan Schmid as

Vladimír Hrabánek as

Jiří Kodet as

Vladimír Hrubý as

Mirko Musil as

Jan Pohan as

Jiří Lír as

Jaroslav Tomsa as

Svatopluk Skládal as

Luďa Marešová as

Věra Koktová as

Jaromír Kučera as

Miloslav Homola as

Karel Bělohradský as

Oldřich Velen as

Jan Kuželka as

Jiří Patočka as

Vilém Lipský as

Zdeněk Svěrák as

Václav Procházka as

Jaroslav Vozáb as

Karel Fořt as

Karel Ješátko as Photographer

Jiří Kučera as Photographer

Jindřich Panáček as Photographer

Zdeněk Vávra as Photographer

Petr Svárovský as

Marie Retková as TV Presenter

Alena Kahovcová as

Milan Klacek as

Martin Krb as

Jiří Krb as

Viktor Nejedlý as

Iva Petříčková as

Radovan Versigan as

Pavel Dražan as

Jan Paukert as

František Kubíček as

Lubor Cába as Assistant Camera

Lubomír Havelka as Assistant Camera

Vladimír Tříska as Assistant Camera

Jan Valouch as Assistant Camera

Karel Smrž as

Vladimír Jiránek as

Jiřina Kotoučová as

Eva Lukešová as

Zdeněk Srstka as

Jaroslav Kočárník as Camera Operator

Vladimír Procházka as Camera Operator

Miroslav Tomek as Camera Operator

Václav Vokoun as Camera Operator

Ivan Petrák as TV Editor

Vladimír Svitáček as TV Director

Petr Drozda as

Evžen Podařil as