CARS: 1958 Ford Skyliner retractable, black, top down (Mason). From The Cars by Greg Cockerill.

Maggie Mahoney is the mother of Oscar-winning actress Sally Field. Submitted by Ed Zoerner, 1/06/10.
+ Mahoney’s real name is Margaret Field (hence daughter’s surname). Submitted by gracenote, 8/11/2010.
+Margaret Field was married to former Tarzan Jock Mahoney, hence her last name. Submitted by PaulDrake33. 11 April 2012.
+Maggie Mahoney is 36 years of age here. She looks considerably younger. Submitted by vgy7ujm, 9 January 2021

Character Names: In this episode, Grant Reynolds’ middle name is Willoughby and is stated more than once. Submitted by gracenote, 8/11/2010.
+ Martell: there's Joyce in TCOT Deadly Double" (ep 24), Eva in this episode, and Vera in TCOT Duplicate Daughter" (ep 121). jfh 12Jul2019
+ And Arlene Martel TCOT Dead Ringer (ep. 267). Kilo 7/13/2020.

Sightings: You can see the man PaulDrake33 refers to in Episode #48, “TCOT Purple Woman,” in the courtroom gallery in this episode—a dark-complected man with a pencil-thin mustache who resembles Leo Carrillo. This time he is more inconspicuous. Submitted by gracenote, 8/11/2010.
+ And now we call him Pencil Mustache Man. Submitted by gracenote, 8/20/2010.
+ Another spectator of the proceedings is Distinguished Gentleman #1, who has donned glasses for the occasion. He is seen, for instance, in a cutaway to Mr. Reynolds. And “Miss Carmody” is seen as Burger stands up to make an objection. As the court recesses we see Distinguished Gentleman #2 file out with the others, and as court resumes, Quiet Old Man #1 files in. And sitting near him is the Little Old Lady in a Hat. Submitted by gracenote, 2/14/2010.
+Distinguished Lady #4 is in her favorite spot in the back row behind Perry. Submitted by BigBill767, 2/4/17.

Uncredited Actors: Don Anderson appears as the Interstate Detective operative trailing Maggie Mahoney and her aunt in the restaurant. Submitted by FredK, 2 October 2010.

In a very odd shot closing the trial, Perry is shown with the back wall behind him as he makes the final comment to the murderer. However, there are neither spectators nor courtroom door behind him -- just a blank wall. I speculate it was a re-shoot after the dailies had been viewed. cgraul 4.11.2012
+ Actually, if you look closer, you'll see that Helen Reynolds is on his right, and a man's sleeve is on his left. The center IS a blank wall because the doors are offset to the sides of the courtroom (see Wiseguy70005's reply below). This is the corridor people approaching the bench used. LazarusLong 5.24.2016
+ In this episode we see the entrance behind Della on the side of the courtroom rather than along the back wall [as in the following episode "The Glittering Goldfish" where there is a dramatic shot of the doors opening to allow a spectator (and the camera) in and the camera proceeds straight down the aisle to the judge]. In this episode, when Paul comes in to talk to Perry, he has to make a 180 degree turn after going through the gate. How often do we see this alternate courtroom set? Submitted by Wiseguy70005, 8/05/12.

Stock Music: The music heard at the start of the episode as the women wait for an appointment with Slater and continues as Slater looks Eva over is called "Street Moods in Jazz" and was composed by Rene Garriguenc especially for the CBS Music Library. It can be heard in many episodes of Perry Mason and The Twilight Zone (and undoubtedly other CBS-produced series of the time). And like the jazz theme composed by Jerry Goldsmith (see trivia note, episode 47, "The Jilted Jockey") it has become so identified with The Twilight Zone that it appears on Varese Sarabande's Twilight Zone soundtrack along with Goldsmith's jazz theme. The 4:05 track, also entitled "Jazz Theme," can be found on the album (Volume Four, STV81192) and CD (''The Best of... Volume One, VCD47233). Submitted by Wiseguy70005, 8/05/12.

Paul's knock is heard before the intoductory music for Act 2. Submitted by Wiseguy70005, 8/05/12.

Syndication cuts: Scene of Eva and Agnes in the bedroom discussing Slater, seeing out the window the men who are following them and thinking they made a mistake; Mason tries to make a deal with Burger but he refuses; Barbara Slater's first testimony. Additional Hallmark cuts: Mason explaining Eva and Agnes could be charged with felonious entry, larceny, grand theft or bunco; asking why they took the job, because they needed money for Eva's music studies [in the uncut/syndicated versions Perry says they need protection because they want to continue the money for music studies, in the Hallmark version because they are being followed]; Mason asking Helen why she commissioned Slater, Helen saying it's her business, Mason agreeing as long as she breaks no laws or jeopardizes others' rights; Helen saying she hates men like Mason, Mason saying she must sign the document or explain the situation or he will instruct his clients to return to their own apartment; Drake telling Mason he had the perfect opportunity to discover who was tailing Mason's clients; Drake's info about the Interstate detectives feeding info and reporting to the client in person; Mason asking Agnes to tell what happened, what kind of gun she had, Agnes saying she lied about having one, telling the police the truth and not disturbing anything in the murder room; conversation between Della, Paul and Perry after the judge adjourns for the day [a three-note piece of music is dubbed over Perry and Della preparing to leave to indicate the end of the act]. Submitted by Wiseguy70005, 8/05/12.
+ MeTV wisely showed the bedroom discussion/window seeing shots Today: both are important Context scenes. Mike Bedard 6.13.16
In the MeTV version I just watched, Agnes is taken in for murder at Perry's office and the next scene is both women at the defense table at court being accused of murder. Was something cut here? -yelocab 08NOV18
+ Eva stays behind and speaks with Perry. She tells him that she was not with Aunt Agnes all day contrary to what she told Tragg. Perry meets with Burger to tell him Eva's statement may have been in error and wants Burger to not take any action against her. Burger says "no deal". Kilo 1/11/2019.

Unsolved mysteries: Once again Perry and Paul were stymied when they failed to learn the identity of Barbara Slater's male friend (+ should be "Helen Reynolds's male friend"). There was a similar situation in episode 42 TCOT Pint-sized Client. Submitted by H. Mason 9/28/14

Burger's office: The old establishing shot from episode 10 TCOT Runaway Corpse was used instead of the newer one shown in episode 22 TCOT Fugitive Nurse. Submitted by H. Mason 10/15/14

This is the first of five PM appearances by Paula Raymond...MikeM. 9/19/2016

Melvin Slater worked for The Interstate Detective Agency. But in his office is a certificate for The Curtis Private Detective Agency on the wall behind his desk. Submitted by Kilo 4/12/2018.

This is the first of five PM appearances for Sheila Bromley (Agnes Nulty), who worked steadily in films and television from 1930 until 1975. Sheila Bromley passed in Los Angeles in 2003 at the age of 91...MikeM. 6/29/2018

In episode 33, TCOT Long-legged Models, Joe De Santis played George Castle who lived at the Lodestar apartments. The same apartments where Helen Reynolds lives in this episode. Kilo 1/11/2019.