Upon completing his communication with Malloy, Sgt. MacDonald ended his radio transmission with KMA. KMA was the official Federal Communications Commission call sign for Los Angeles. KMA-367 was the designation for Los Angeles Police Department radio transmitters from 1948 through the 1980s, but most of the time, dispatchers would shorten it to just KMA.
Sgt. MacDonald's radio call sign was L20.
To gain access to the drug house at 23rd and Victoria, one had to knock once, wait a few seconds, and then knock again.
Action that related to this episode but was not seen on screen involved Malloy serving an entertainer by the name of Randy Tait a subpoena. They assumed it would be something bad, making it difficult for Reed to ask Tait to be the featured entertainment at the annual department party. Turns out the subpoena was expected for a case he was testifying in and he was glad to work the party for Reed.