The Wellman's address is stated as 1882 Academy Drive. In the real world, this would mean they lived next door to the LAPD Police Academy which is located at 1880 Academy Drive.
One of the fighting neighbors was played by Dick Sargent, six months before he began his most famous role as the 2nd Darrin on Bewitched (1964). And here, he sounds (and postures) much more like his "authentic self," than he ever did, as Sam's husband.
Yellowtail could refer to a number a different species of fish, but in this instance being in Southern California, it most likely refers to California yellowtail, which goes by various names including amberjack, forktail, mossback, white salmon and yellowtail tunis.
Code 2 = urgent, no lights or siren.