When Leo Mann approaches Sibyll Pollard about her signature on a legal document, he asks, "Is this your John Henry?", rather than "John Hancock". This is not a mistake. Approximately 50 years after John Hancock signed the Declaration of Independence with an outsized signature, the name "John Henry" started being used as a synonym for a person's signature, particularly among cowboys in the western United States. The folk hero John Henry, the "steel-drivin' man", came along much later in the 19th century. When this episode was filmed, the use of "John Henry" was not uncommon.
To make good his alibi, the killer must be able to call probation officer Roy Galen in his office at 8:30 pm. It's hardly likely for a probation officer to be on duty at that late hour.
Actually, probation officers can be on duty at any time and often work into the night, and on weekends in order to do their job.
Actually, probation officers can be on duty at any time and often work into the night, and on weekends in order to do their job.
According to the sign shown at 7:00 of the episode, "Judge Robert Alder" is presiding. But, according to the end credits, he is Judge Robert Adler.