Towards the end of 2021, Jean-Louis Comolli was invited by Citéphilo-Encuentros Filosóficos anuales de la región Hauts-de-France to present his latest book, Una cierta tendencia del cine documental (A Certain Trend in Documentary Cinema). Unable to travel to Lille due to his health, Jacques Lemiére (member of the Institute of Sociology and Anthropology at the University of Lille, and head of film art at Citéphilo) decided to visit him and interview him at his home in Paris, so that he could then present this dialogue at the conference. Recorded and edited by Ginette Lavigne (a friend of Jean-Louis but also an editor and co-director of several of his works), we are treated to this exceptional conversation, in which Comolli, despite his fragile health, shines with all his sagacity and reflective originality, giving us almost an hour of his brilliant thinking.