Viewers see Perry's car parked in his building's basement parking garage for the first time in the series. Also,, Perry drives a black Cadillac convertible (not the black Ford Fairlane 500), and his parking space reads "Reserved Perry Mason."
The title of this episode is "The Case of the Fraudulent Foto" - not "Photo", the more common spelling.
Waring County, the California county in which Brander Harris is District Attorney, was made up by the scriptwriters.
Actor Mark Roberts (James Castleton) had his normally dark hair dyed blonde for this episode.