The opening narration states Helen Kimble's maiden name was Waverly and she met Kimble when she was a nurse at the hospital in Indiana where he did his physician internship.
Adjusted for inflation, the $5,000 in Helen Kimble's bank account would equal approximately $44,000 in the year 2022.
When Kimble is in the phone booth talking to Terry Waverly he has a coin laying on the phone book. The coin is a Walking Liberty half dollar. Walking Liberty half dollars were minted from 1916 until 1947.
In a 2021 radio interview with Ed Robertson, Louise Sorel said David Janssen was a sweetie - a lovely man.