At the start of the show, Lisa Ralph is driving a 1971 Chevelle convertible (identifiable by having single headlights). When the man in the Imperial begins to chase her, the car suddenly becomes a 1970 model (dual headlights).
When Lt. Tobias and Don Ralph get out of the car and walk to Mannix's office, it is raining steadily. Yet when they enter the office, their hair and clothes aren't wet.
When Julia/Lisa is waiting in her car observing Mannix's office, the closeup shots inside the car shows the windshield wipers on steady. It shows an outside shot with the wipers off, followed by another closeup with the wipers on.