Barbara Hale's husband, Bill Williams, guest stars in this show. Unlike "Crippled Cougar" (S5/E22) (1962), Barbara and Bill were not on-camera together.
The last of five appearances in the series by Mary LaRoche. She was the murderer in three of them.
When Linda Blake was tentatively walking toward the boiler room, background music playing sounds like the same music heard later on Star Trek TOS.
Even though Della was presumably in Ladera the entire episode, she was never seen at the "defense table" for the preliminary hearing. (Along with Perry, Paul was indeed at the hearing.) Later, in the epilogue (still in Ladera), Della was finally seen once again.