If you look very carefully, you will notice that the arsonist is driving a different Ford station wagon in several of the scenes. The car is the same color but the wheel covers are different! One wagon has a pie pan shaped wheelcover, the other has fake mag wheel type wheel covers!
(You have to be a true Ford fan of the 60's to catch this!)
In this episode. Inspector Erskine wears a patterned sport coat instead of his usual suit jacket.
In Act IV of this episode. Assistant Director Arthur Ward wears a fedora hat.
None of The mob members in this episode had Italian surnames.
In the end credits. Inspector Erskine drives a black 1967 Ford Mustang Convertible with a red interior.
Louise Latham and David Macklin had previously played mother and son in the episode "How to Murder an Iron Horse".