Undercover policewoman Maryha Cole (Pamela Duncan) said she is with the Dayton Police Department. In 1958 Dayton, Ohio had a population of about 260,000 and was the 49th largest city in the United States.
First use of the 1958 Buick Century-Model 61 as a patrol vehicle. The Model 61 featured a 364 cu.in. Fireball V8, rated at 300hp and 400 ft-lbs of Torque. The 364 had a compression ratio of 10.0:1 and a four-barrel carburetor. The suspects are driving a 1957 Chrysler Windsor Town and Country Wagon.
Broderick Crawford performed all of his action fight scenes in this episode.