The location where Mannix met up with Cindy in the final act was a warehouse full of studio lighting equipment, most likely the storage facility for Paramount's lighting gear.
The gold-with-white-top 1970 Chevrolet Nova driven by the drive-by shooter at the beginning of this show and later tailing Mannix while being driven by Roger, was also used in S4, E20, "A Day Filled with Shadows."