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).