A criminal produces an uncontrollable laughter to the population and Mortadelo and Filemón will have to stop him.
Karra Elejalde
as Mortadelo / Tía Fulgencia (voice)
Janfri Topera
as Filemón (voice)
Gabriel Chame Buendía
as Jimmy el Cachondo (voice)
Ramón Langa
as Filemón en sueños (voice)
Mariano Venancio
as El Súper (voice)
Víctor Monigote
as Tronchamulas reversizado (voice)
José Alias
as Tronchamulas (voice)
Emilio Gavira
as Rompetechos (voice)
Enrique Villén
as El Profesor Bacterio (voice)
Berta Ojea
as Ofelia (voice)
Athenea Mata
as Señorita Irma (voice)
Chani Martín
as Mari (voice)
