Filmed in and around the streets of Sylmar Los Angeles on Dronfield Place, Foothill Blvd, Sproule Ave and on the (still under construction) Foothill freeway. The cave was in the Roxford Street underpass next to the off-ramp.
When Malloy and Reed pull in front of Duke's, the '68 Gold Mustang Coupe is parked along the street.
The stolen car, a brown hardtop, has the same license number (LXI-483) as the plate number used in the opening credits. the same number is used for a different car (a stolen red convertible) in the next episode.
Code 5 = stakeout.
DMV = Department of Motor Vehicles.