Javier Fesser's stylish action comedy Le Gran Aventura de Mortadelo y Filemon (Mortadelo & Filemon: The Big Adventure) brings to life a pair of comic-book characters. Filemon (Pepe Viyuela) and Mortadelo (Benito Pocino) are bumbling secret agents who are fired after their supervisor hires Fredy Mazas (Dominique Pinon) to track down a powerful substance invented by Prof. Bacterio (Janfri Topera) that has fallen into the wrong hands. At the time of its release in its native country of Spain, the film had the most successful opening weekend in history for any domestic film.
~ Perry Seibert, All Movie Guide