Lt. Tragg (Ray Collins) refers to the home movie film as "15 millimeter film". Home movie film at that time was 16-millimeter format.
In court, immediately after District Attorney Hamilton Burger (William Talman) plays a short home movie, the judge adjourns court due to the 'late hour' yet, in the next scene in a meeting with the defendant Joseph Harrison (John Hoyt), Perry Mason (Raymond Burr) contradicts the judge's 'late hour' adjournment by saying, "They certainly put the spurs to us this morning with those home movies, why didn't you tell me about them?"
In the courtroom, Michael Fox is referred to as Dr. Hoxie by Hamilton Burger. In the credits, Michael Fox is credited for Dr. Samuel Anders.
As Perry questions Ms. Collaro on the stand, she said she had worked in Paris. She twice pronounced 'Paris' with the 's' sound at the end. Anybody who spent enough time there to be employed in the city would adopt the French way of pronouncing the word -- without the 's' sound at the end.