When the green Ford Galaxie that Sgt. MacDonald is using during the stakeout for the purse snatchers first rolls out to apprehend the suspects, the Ford lettering on the front edge of the hood is covered with silver tape. Later when this same car stops in the road to nab the suspects, the tape no longer appears.
When they are responding to the liquor store, the film is artificially sped up to make it appear that they are traveling fast.
At the stakeout with Brinkman at 758 North Hudson Ave, Reed and Malloy are sitting in the green
Mercury station wagon with brown paneling crew car seen in several episodes. Also, the gold Mustang with the white top crew car can also be seen sitting right outside the apartment bldg. in the same scene.