Doctor Baltazar gets visit from his friends Karlsson and Juan Karle at his laboratory.
John-Lennart Linder
Director
Nils Poppe
Dr. Baltazar
Hilding Gavle
Professor Gustav Örnstedt
Nils Ericsson
Juan Karle
Einar Axelsson
Per Jägerstam
Carl Hagman
Karl Jägerstam