At the beginning of the film, Frédéric Bourdin's hair line is very defined and has dark hair. But by the end of the film he has a noticeable receding hairline. However, the film portrays his talking scenes as one long interview as his shirt never changes.
High mountains visible in background in at least five scenes including sister's airport departure, Nicholas boarding school bus, kids hanging out in vacant lot. Supposedly set in San Antonio which is in the Texas 'Hill Country' but we see real mountains in the background. End credits reveal recreated scenes were shot in Arizona including Phoenix, Buckeye and Avondale where there are numerous mountain ranges often visible in any direction you look at varying distances.