Code Lyoko Season 4 Episode 5 Wrong Exposure

Aelita finds a photo of herself with Franz Hopper at the Hermitage. Jeremy tries to extract information from the picture, as mathematical formulas are visible on a chalkboard in the background. But the image winds up in the hands of Sissi, who passes the photo on to her father. This rouses the Headmaster's curiosity: what is Aelita doing with the former academy physics professor?! It's up to our heroes to protect Aelita's secret ...