One of Rod Steiger's impersonations is of comedian W.C. Fields. Steiger would portray Fields eight years later, in W.C. Fields and Me.
One of the names of actors on poster outside theater is William Henry Pratt - real name of Boris Karloff.
The film was playing in Vallejo, California in April 1969, just after the Zodiac Killer murdered his first known victims, in Vallejo. Many criminologists believe that the Zodiac Killer was a movie buff or was influenced by motion pictures and gleaned quotes from movies for his taunting missives to the police, which began in August 1969, to the Vallejo Times-Herald, the San Francisco Chronicle and the San Francisco Examiner. Others believe that he was from Vallejo. That "No Way To Treat a Lady" was about a serial killer who enjoys taunting the policeman on his trail makes it an interesting footnote to the Zodiac Killer case.