This episode re-uses plot points from two earlier Larosière/Lampion stories. One involves Laurence having sexual performance issues and surreptitiously seeking medical advice, only to recover on his own - a scenario which was previously seen with Larosière in "Un Meurtre en Sommeil". The other involves a cat inadvertently being poisoned from a tray of food prepared for a human, which also occurred in "La Maison Du Peril".