Blooper

Just after Jim's trailer is trashed by the two gunmen, Jim decides to drive with Angel to the police department to file a complaint. While driving, he notices a car, with four headlights, following him in the rear view mirror, and he decides to attempt to lose them, making a sharp turn on to a side street. When the following car turns, it's now a car with just two headlights, and is noticeably smaller.

Close to the beginning of the show, Rockford is driving down the road calmly in a 1974 Firebird (turn signals below the front bumper). When he is trying to elude the Chevy Nova chasing him, he's then in a 1975 Firebird (turn signals in the grille next to the headlights).

When the hitmen in the black sedan follow Rockford and Sturtevant, one of the hitmen puts a silencer on a revolver. A silencer works by muzzling the gases released from the detonating propellant, which reduces the amount of noise and visible muzzle flash generated by firing. Silencers are typically constructed of a metal cylinder with internal mechanisms to reduce the sound of firing by slowing the escaping propellant gas, which would be impossible on a revolver, since the propellant gas can escape in any direction from the open revolving cylinder.

After Rockford gets released from the murder charge he meets with Angel in a coffee shop. As that scene opens in view is the pay phone Angel is making calls from. The phone number in the pay phone is clearly visible and is a real phone number, not a 555 number. It is 213-348-5156. 213 is the area code for central LA.

King Sturtevant mentions he is from southern Illinois several times and south Chicago a few times. Southern Illinois and south Chicago are not the same place. It's like using northern San Diego and northern California interchangeably.

Rockford puts a handkerchief on the murder weapon and then picks it up for no reason other than to proclaim it as a possible murder weapon.