Guest star Norm Crosby, who portrays the feuding husband, is not related to series semi-regular Gary Crosby (Officer Ed Wells).
Mr. Colvin's car is a 1971 Chevrolet Bel Air. It is likely the same one that was used in the earlier season 4 episode, Ambush (1971), as the car used by the two hit men. While the hit men's car was white, and Colvin's car was yellow, if you look closely when he gets out of it, white paint is visible on the door jambs, indicating a repaint.
Code 2 = urgent, no lights or siren.
211 = robbery.
415 = disturbance.