Sign above the marshal's office door say US Marshal but he's the city marshal.
The rock thrown at the car bounces off the windshield only damaging the safety glass but not penetrating it, but the Sheriff is shown bleeding from his face.
The Sheriff is shown chasing a man on foot in his car. The chase goes on for several seconds and can't catch him until the man stops running at the cliff. No person alive is fast enough to outrun a car.
The driver tells the attendant that the correct pressure in the tires is 24 in the back and 28 in the front. The correct pressure in tires in the 60 s was 30 to 32 PSI in both front and rear tires. Both front and rear tires were inflated to the same pressure.
The closing credits list Pat Hingle as "Sheriff Joe Bob Sims" but signs at Apache Park and the municipal building clearly state "Marshal Joe Bob Simms" (with 2 ms) and he's referred to as "Marshal" throughout the episode.
Dr. Kimble is supposed to be in Bixton, Arizona but when Marshal Sims drops Kimble off at the city limits, you can see waves breaking on the beach in the background.