A criminal produces an uncontrollable laughter to the population and Mortadelo and Filemón will have to stop him.

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Main Cast: Karra Elejalde, Janfri Topera, Gabriel Chame Buendía, Ramón Langa, Mariano Venancio, Víctor Monigote, José Alias, Emilio Gavira, Enrique Villén, Berta Ojea

Director: Javier Fesser

Writers: Javier Fesser, Cristóbal Ruiz, Claro García

Editor:

Cinematographer: Miguel Pablos

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