For the 1989 season, no Nuls on daily TV so that's why Canal + invented the Guignols for NPA! The band did however a special production aired a Saturday evening: i can't remember if i watched it live or on a tape and they do what they used to do before: so it's always the same content about spoofing TV, movies and musical videos. I remember particularly the minimalist rural sketch in black white La Paille Et Le Grain that is boring as ever; the wet logo for ads and unlucky announcers were rather funny..
In their compilation DVD called l'Integrule, as the content is totally dislocated without dates, it's really hard to tell more as they did the same funny jokes for 6 years! But they were so accurate and close that they influence our attitudes too (ex: now a suppository and the bed!)