-The actress playing Linda Mae Jenkins is clearly visible in close-up shot in a car leaving the Unites States Army's Red River Arsenal at the very beginning of the film;
-The actress playing Peggy Loomis can also be seen at the very beginning of the film at the Paramount Theatre in the back seat of a car;
- At the same Paramount Theatre scene, an extra is seen crossing the street with a white and blue shirt. This same extra can be seen together with a small gathering of people right after the first victim, Linda Mae Jenkins, is found alive and the ambulance is arriving. Again, this same extra can be seen after the second attack, when a gun store is shown. Lastly, this same extra is probably used again carrying the groceries for the Dawn Wells' character during the "Friday, May 3rd" caption;
-The Police Department telephone operator who answers Mrs. Kiner phone calls can be seen reinforcing her curtain window right after the second attack. Also, at the high school prom, she can be seen pouring sloe gin at the red punch;
-The black guy identified as Mr. Johnson, who is giving a detailed statement to Captain Morales of how the supposed killer has threatened him, can also be briefly seen moments earlier as waiter on the restaurant scene.