As with most of Jack Webb's television series of the era, sitar music plays loudly whenever dealing with druggies or "alternative religions", and it pretty much stands for "demented whack job alert!". Here, it starts playing as soon as they enter Liam Sullivan's character's "temple", as it did in his popular Dragnet 1967 (1967) title.
Sybil Brand Institute, mentioned by Malloy, was a women's jail in Los Angeles County. Brand herself was an activist best known for improving jail conditions for women in Los Angeles. It closed in 1997 due to its poor physical condition.
Code 5 = stakeout.
484 = theft.