The movie is actually a spin-off from a popular 1950's TV series. The Lineup (1954) ran on CBS from 1954 to 1960. It was a Dragnet (1951)-style "police procedural" drama, set in San Francisco, but filmed on Hollywood sound stages. Warner Anderson and Marshall Reed reprise their TV show roles in the movie, as Lt. Ben Guthrie and Inspector Fred Ascher. However, Tom Tully, who played Inspector Matt Grebb, Guthrie's partner on the TV show, was not available to make the movie. He was replaced by Emile Meyer as Inspector Al Quine.