In this episode one of Adeline's ex-boyfriends arrives one morning at the flat (apartment) that she shares with Gérard; she's not there but Gérard is and the "importun" (~nuisance) wallops him in the face.
Later discussing the incident from Gérard's description two names are suggested "Jean-Luc" and "Jean-François" - taken from the creator Jean-Luc Azoulay (who adopted the name Jean-François Porry).