Perry is seen wearing a cast on his right arm. Perry tells Lt. Tragg that it is an old war injury that has flared up. In reality, Raymond Burr had been injured in a helicopter crash on one of his many tours of Vietnam to entertain the troops, during a hiatus in filming Perry Mason. He wore a cast on his arm and shoulder for three months. The wardrobe department had him wear oversized suits to cover the cast. Viewers at the time thought he was gaining weight again. Submitted by P. Armstrong, 6/12/2012.

Raymond Burr visited U.S. troops in Vietnam in 1960? When there were all of 900 U.S. military personnel in Vietnam, none of whom were combat troops, and most Americans had never heard of Vietnam? Submitted by 65tosspowertrap, 7/11/2013.

+ There might be some confusion here. Raymond Burr's arm was injured in a few early 1965 episodes. These may be the result of the Vietnam crash described above. Submitted by Wiseguy70005, 7/14/13.

Still highly unlikely. The first U.S. combat troops (3,500 Marines) arrived in Vietnam in March 1965. Submitted by 65tosspowertrap, 9/20/2013.

Raymond Burr's Wikipedia page suggests he may have visited Vietnam more than once. The year 1965 is mentioned, as well as a 1967 NBC documentary about one or more of his visits. In the 1967 NBC News Special, Burr says it is his TENTH visit to South Vietnam. He said that when he made his first visit, there were only a few hundred American service personnel in the country. This means his first trip might have been before 1959, when the US troop level was almost 800..MikeM. 8/24/2016

Some of the exact same music from the fight scene in the quarry can be heard in North By Northwest. The connection is probably the film’s original music composer, Bernard Herrmann, who also did music for Perry Mason. Submitted by Adam Kamil, 11/26/04.

The music heard in this episode IS by Bernard Herrmann, but not from North By Northwest, but from the score from the premiere episode of "Twilight Zone" - "Where is Everybody?", originally televised on October 2, 1959. Original scores for CBS television programs then became part of their "stock" music library, and were used in other programs. Of course, there is a similarity to "North by Northwest" - but this music is definitely from TZ's "Where is Everybody". It can be heard on a Varese Sarabande 2-CD set "Bernard Herrmann - The Twilight Zone". Submitted by Sidney Keywood, 11/13/12
+ The "Where Is Everybody?" music can be frequently heard on Perry Mason, the first time one week after the original broadcast of that Twilight Zone episode. People here have confused music from both Psycho and North by Northwest with music on Perry Mason. The fact that North was an MGM movie and Psycho was a Paramount release makes it unlikely CBS could get the rights to those music selections...even IF they wanted to. Submitted by Wiseguy70005, 7/14/13.

Location: The house featured in the opening and again 3 minutes later is at 2600 Park Oak Dr. near Griffith Park. Submitted by Eric Cooper 1 October 10. Some pictures here.

Cups from the Curious Coffee Set can be seen in Perry's office. More info here. Submitted by daveb, 12/30/10.
+ TCOT Changing Carafe: Of course Della loves the Curious Coffee Set and always keeps it near, but she has not settled on a way to serve the coffee and so she changes carafes from episode to episode. This time we have a solid colour one with a shiny metallic band around the neck, an ultra-modern "butterfly" handle, and its own sleek stand. Submitted by catyron 12/12/17.

Sightings: “Miss Carmody” and Distinguished Gentleman #1 watch Mason at work in the courtroom. Read more about these favorite frequent faces. Submitted by gracep, 10/26/2010.
+ Uncredited Actors: Robert Wegner appears ever so briefly as a bartender at Carelli’s. We see him mainly in profile and with his back turned. He makes a second appearance, but I won’t spoil it for you (see Comment section for spoiler if you’ve seen the episode). Meanwhile, Don Anderson looks pensively on from the courtroom gallery. Submitted by gracep, 10/26/2010.
+Don Anderson also makes an appearance as the jail guard as Perry interviews the defendant. Bill767, 1/3/16.
+ Continuity: Don Anderson appears on both sides of the courtroom gallery at different points during the hearing. So does “Miss Carmody” Submitted by gracep, 10/26/2010.

CARS. (1) Marge Fuller's medium-color 1960 Mercury Comet 4-Door Sedan, Lic No TZX 479, almost certainly the exact same car as Car (1) in Ep#100.

Car(2) could instead be an Invicta, the next model up the Buick line. Called the "Banker's Hot Rod", Invicta had a larger engine and more trim options than LeSabre. Added by Gary Woloski, 9/22/12.

This is the first of two PM writing credits for Michael Morris. He was born in Ukraine in 1918 and passed in Los Angeles in 2003...MikeM. 8/25/2016

This is the second of five PM appearances by Melora Conway...MikeM. 8/25/2016

This is the only PM appearance for Lori Kaye, who appeared in two episodes of Surfside 6...MikeM. 12/1/2016