This one-pager is the 28th part of an 60 pages long story about the journey of "agent spatial", which appeared between number 506 and 560 of the magazine. Every part of the story is one page in one issue and a crossover with one of the featured comic heroes of "Journal de Tintin".
The whole story appears in "L’Aventure du journal Tintin - 40 ans de bandes dessinées".