[3] Sergeant Matt Grebb, who was heard giving instructions to participants in each lineup, was "quick-tempered and often bored", while his boss, Lieutenant Ben Guthrie, was "soft-spoken and calm.
Each episode began with the announcer saying: Ladies and gentlemen, we take you behind the scenes at a police headquarters in a great American city where, under glaring lights, will pass before us the innocent, the vagrant, the thief, the murderer.
[3] The series was usually sustaining but at times was sponsored by Plymouth dealers, Wrigley's Spearmint gum, and The U.S. Army and U.S. Air Force recruiting Service.
"[6] The review complimented the "compact script" and "tight direction" that enabled the story to progress "in a suspenseful manner, without telegraphing the denouement".
[6] Scripts of episodes of The Lineup and printed material related to other old-time radio programs are held in the KNX Collection at the University of California, Santa Barbara Library.