The Number of Completion is the fourth short film of Impressions: A Journey Behind the Scenes of Twin Peaks. The film follows Lynch during the filming of scenes set in the Fireman's home, Sheriff Truman's office, and the KPJK radio station. He discusses scenes with actors Joy Nash, Robert Forster, Jim Belushi, Kimmy Robertson, Kyle MacLachlan, Laura Dern, and Robert Broski. Carel Struycken is also briefly featured, practicing his lines.