Location: The County Courthouse early in the episode is actually the Malibou Lake Clubhouse which still exists. The Clubhouse has been used in several Perry Mason episodes like episode #113. Malibou Lake is also featured in episode #45 and 195. Posted by Eric Cooper, 9/21/2009.

About 34 minutes into this 1966 episode, Paul, Perry, and Della go to Natasha’s and you can clearly hear the 1965 #1 hit “Downtown” play in the background. Posted by Eric Cooper, 9/21/2009.
+ Also playing in the background is "Bye Bye Baby", notably sung by Marilyn Monroe in the 1953 movie "Gentlemen Prefer Blondes". jfh 10Aug2018.
+ A snippet of "Bye Bye Baby" is also sung by 'Sandy Chester' two episodes later in "The Case Of The Avenging Angel". jfh 14Aug2018.

Location: At the same time that Downtown plays, Paul checks the car registration of Cynthia Perkins. Her address is listed as 1416 No. La Brea. This is an inside joke. That address was not only the home of Perry Mason’s production company Paisano Productions from 1961 to 1966 but also where Raymond Burr often slept during the filming of episodes. It was originally Charlie Chaplin studios but is currently home to Jim Henson Productions. Submitted by Eric Cooper, 5 October 2010.
+ Photograph of 1416 LaBrea in 1965. ----cgraul 6.25.16

Sightings: Even though the preliminary hearing is not in Los Angeles, both Little Old Lady #1 makes the trip out to the country to be part of the spectators. A somewhat older Distinguished Lady #3 might be there as well. More about these and other favorite frequent faces. Submitted by gracenote, 6/4/2011.

Character Names: ... or, at least, initial. Sheriff Moose Dalton's first initial is "A", as shown on the door to his office. jfh 10Aug2018.

Will Hutchins portrayed Dagwood Bumstead in the second Blondie sitcom in 1968. The first Blondie series (1957) starred Arthur Lake, the Dagwood of the movie series. Submitted by Wiseguy70005, 6/15/12.

Gene Evans appeared as a race-track Security Chief in "Message From Beyond," Season 1/Episode 1 of IRONSIDE. A 2nd Ironside & a War Correspondent role in "Blood & Guts," M*A*S*H are in his IMDb Filmography. Mike Bedard 3.5.15.

It's interesting that Raymond Burr was already beginning to look like his Ironside character in this final season (just the wheelchair was missing). Submitted by HamBurger, 07/02/2017

This is the only PM writing credit for Kenneth M. Rosen, who was head writer for 37 episodes of "Days of Our Lives" in 1965...MikeM. 3/31/2017

This is the only PM appearance for Luana Patten who, at the age of eight, was featured with Bobby Driscoll in Disney's "Song of the South"...MikeM. 4/6/2018

Clint Sundberg was in several of the great MGM musicals, including "Good News" and "Easter Parade". Connie Gilchrist is best known as Nora Muldoon in "Auntie Mame". DOD 04/06/18
+ Connie Gilchrist shows her quick reflexes when her earring drops from her ear, and she manages to quickly trap it on the table. jfh 10Aug2018.
++ And it's good to see 'Continuity' is on the ball, as her earring is missing in the following close-ups at the table. Submitted by Tragg, 1st August 2022.