- Piotr Fronczewski
- Professor Ambrozy Kleks
- Jan Jankowski
- Commander Max Benson / Chairman MBM Jacek Bronowski
- Henryk Bista
- Great Electronics / False Portuguese monk #1 / Mechanic #2
- Monika Sapilak
- Agnieszka / Child from Orphanage
- Piotr Ptaszynski
- Gros 'Groszek' Benson / Child from Orphanage
- Bohdan Smolen
- Governor Don Manuel Karmello de Bazar / Jarzabek the Driver
- Maryla Rodowicz
- Linella Carmello de Bazar
- Malgorzata Puzio
- Melosmiacz
- Mieczyslaw Gajda
- Melosmiacz / Bajtek the School Robot (voice)
- Andrzej Rosiewicz
- Melosmiacz
- Emilian Kaminski
- School director Kudlacz / Supervisor Gladysz
- Zbigniew Buczkowski
- Colonel Alojzy Babel
- Zofia Merle
- Mrs. Marciniakowa
- Henryk Talar
- computer Lucas
- Irena Kwiatkowska
- Information Ball
- Marek Sierocki
- TV 'Internews' presenter
- Maria Probosz
- Sandy
- Marian Glinka
- Guard of Robot's Junkyard
- Mariusz Leszczynski
- Silver the Robot
- Bruno O'Ya
- Commander of the ARGO 1417
- Zdzislawa Specht
- Gloria Casate
- Nina Goclawska
- Gina Casate
- Marlena Drozdowska
- Gloria Cassate / Gina Cassate (singing voice)
- Witold Debicki
- Dr. Paj-Chi-Wo
- Ján Mildner
- Chinese emperor
- Leon Niemczyk
- Don Filippo
- Marcin Tronski
- Prime Minister of Planet
- Jan Himilsbach
- Receptionist
- Beata Kozidrak
- Princess from Rock-Comet
- Izabella Miko
- The Girl with the Matches
- Jerzy Moes
- Embassy representative
- Anna Frankowska-Teter
- Reporter
- Alfred Freudenheim
- Admiral
- Judita Vargová
- Chinese Empress
- Pawel Wisniewski
- Future School Student
- Jacek Domanski
- Flight control officer
- Mieczyslaw Kadlubowski
- Pilot
