In this interview Pierre Demarque discusses topics such as: his early interest in astronomy; listening to radio lectures by Fred Hoyle; study at the University of Toronto; interest in cosmology; work with Leonard Searle; master's thesis on stellar structure; influence of Searle and J. Beverly Oke; move to the United States and Louisiana State University; University of Illinois and the influence of Ivan King; Ludwig Biermann; George McVittie; going to the University of Chicago and contact with Chandrasekhar; stellar evolution; Yerkes Observatory; leaving Chicago for Yale University; Walter Baade philosophy of studying cosmology; globular clusters; John Eddy's work on solar variability; stellar populations and galaxy evolution.