If we go by actual time between the end of the series and the first TV movie then Paul Drake, Jr. would only be a teenager instead of a man in his 30's. When the series ended in 1966 the original Paul Drake was still a bachelor so assuming he married and fathered a child by the time of the first TV movie the child would only be in his teens. Unless, of course, Paul fathered a child out of wedlock during the course of the series' run and the son took his name. Which is entirely possible considering the fact that the Paul Drake of the series was a major league womanizer.
In 1963 California license plates changed from yellow to black. In courtroom transition scenes shown from time to time through the end of the series, Perry gets out of an early 60s black Ford and walks behind in toward the court. The plate on the back of his car is clearly yellow '62 XCF.
Perry loses the civil case in this episode due to chicanery on the part of the opposing party.
A stock shot of Raymond Burr walking into the courthouse is used showing Burr's old hairstyle while in the rest of the episode he wears his new Ironside-looking haircut.
Trivia: We briefly get to see the inside of Hamilton Burger's living quarters.
In one scene, Perry Mason is getting out of a 1962 Ford convertible at the courthouse but all the other cars in the episode are 1965s, including the Lincoln convertible he drives.
Carla Chaney was held at the Sybil Brand Institute for Women in the county of Los Angeles. The famous county jail is named after noted philanthropist and civic leader Sybil Brand (May 8, 1899-February 17, 2004).
Trivia: We learn that Della Street hails originally from Tennessee.
There were only 4, 1861 Confederate half dollars made. They are now classified as priceless in the episode the largest offer made was for $60,000. There were 500 restrikes of the Confederate half dollar made, they average between $4,000 - $8,000 now. The reverse has the Confederate States of America with a shield in the middle and Half dollar on the bottom of the reverse side. The other was a restrike of 500 Scott half dollars worth between $1,700 - $3,500. The Scott half dollars were made by J.W. Scott a New York coin dealer in 1879 who bought the original Confederate dies in the 1870's. The coins were struck with a Scott advertising inscription and the Confederate insignia on the reverse.
Trivia: This episode is the only one where the presiding judge performs a marriage ceremony.
This was the only case in which Mason's client was found guilty, and sentenced to death. The outcry from the public was so severe that they never ventured down this road again.
It's stated that Caleb Stone and John Brooks grew up together in an orphanage in Charleston, SC but since one was white and the other Afro-American wouldn't they have been placed in segregated institutions since Charleston is located in the Deep South?
In the scene at the shack, Lt.Tragg can be seen talking into his flashlight and not his walkie-talkie.
Trivia: This is the only time that Perry Mason shared the screen with the one filling in for him. He only spoke to the others through the phone.
Trivia: When Dick Wilson is in the cell next to Michael Parks, he is reading a comic book called Penalty!. Originally titled Crime Must Pay the Penalty, this comic book began in 1948 and ended in the early 60s under the new title Penalty!.
Trivia: The real name of the murderer is never given.
The final denouement for this episode occurs not in a courtroom but on a theatre stage where the murder occurred.
When August Dalgran throws money out of the window, you see the Hollywood Walk of Fame below.
When the body of the victim is found, Beethoven's Symphony No. 5 is playing.
Even though this episode was both filmed and broadcast in 1962, the calendar on the wall of Len Dykes' work area is from 1960.