The Walking Dead‘s 100th issue is poised to be one of the highest selling comics in years, its blockbuster success fueled by the record-breaking TV series. Looking at it now, the show seems like a no-brainer, but it didn’t have an easy journey to the screen. Robert Kirkman discusses some of the ups and downs in creating the show.

This footage is from the upcoming Sequart documentary, The Image Revolution, which features an extensive interview with new Image partner Robert Kirkman.