The actual location where the first armored robbery went down is the 10100 block of Riverside Dr at Mariota Ave. in the Toluca Lake neighborhood of Los Angeles. This intersection appeared many times on this series as well as Emergency! (1972) This intersection is less than a mile away from Universal, both series' home studio.
Months after Larry Linville's appearance, he signed on to play Major Frank Burns on M*A*S*H (1972), a role which he then played for five years. Much like his role on MASH, Linville's Adam-12 character is intentionally unlikable.
The character of T.J. (or Tee Jay/Teejay), usually portrayed by Robert Donner, is portrayed this time for the only time by Eddie Quillan.
Code 2 = urgent, no lights or siren.
Three guest stars had the first name Larry and were shown consecutively in the end credits: Larry Linville, Larry Wilde, and Lawrence Levine, the latter indeed credited as Larry Levine.