A private detective, soon to enlist in the army, is drawn into one final case when his police officer father is killed in the line of duty. Soon his prime suspect is murdered as well, and he finds himself framed for the crime. As more witnesses get murdered, he finds himself on the run from both the police and former Prohibition violators who seem to have found a new racket.
A high priest of Karnak travels to America with the living mummy Kharis (Lon Chaney Jr.) to kill all those who had desecrated the tomb of the Egyptian princess Ananka thirty years earlier.
England, at the start of World War Two. Mysterious wireless broadcasts, apparently from Nazi Germany are heard over the BBC. They warn of acts of terror in England, just before they take place. Baffled, the Defense Committee call in Sherlock Holmes.
While an escaped convict, Moose Malloy, goes in search of his ex-girlfriend Velma, police inspector Michael O'Hara attempts to track him assuming him to be a prime suspect for a number of mishaps.
Conniving Broadway starlet Mida King has plenty of enemies, so when she's found murdered at Grand Central Station, Inspector Gunther calls together a slew of suspects for questioning. Mida's shady ex-flame, Turk, seems the most likely culprit, but when smart-mouthed private eye Rocky Custer -- also a suspect himself -- begins to piece together the crime, a few clues that Gunther has overlooked come to light.
Sadistic killer-for-hire Philip Raven becomes enraged when his latest job is paid off in marked bills. Vowing to track down his double-crossing boss, nightclub executive Gates, Raven sits beside Gates' lovely new employee, Ellen, on a train out of town. Although Ellen is engaged to marry the police lieutenant who's hunting down Raven, she decides to try and set the misguided hit man straight as he hides from the cops and plots his revenge.
The police arrest a man climbing over the wall of a cemetery after midnight. He claims that he is being blackmailed and is following instructions he received by mail to leave $1000 on a certain grave. It turns out that he's not the only one who got a blackmail letter from the same person--calling himself "The Black Panther"--and it also turns out that all the recipients are connected to an opera company.
A wealthy and sheltered young woman elopes with a charming playboy and soon learns of his bad traits, including his extreme dishonesty and lust for money. Gradually, she begins to suspect that he intends to kill her to collect her life insurance.
Having forsaken the detective business for the safer confines of personal insurance, Gay Laurence is compelled to return to his sleuthing ways. Along with sidekick Jonathan "Goldie" Locke, he agrees to look into a series of home party robberies that have victimized socialite Maxine Wood. The duo gets more than they bargained for when a murder is committed at Wood's home, but Lawrence still finds time to romance the damsel.
Private detective 'Duke' Martindale and his wife, Phyllis, an attorney, are working together to clear a girl falsely convicted of murdering a judge. Two people who know the truth are killed and 'Duke' Is shot at. Despite some interference by Police-Sergeant Brent, and a dangerous automobile chase and 'Duke' and Phyllis finding themselves prisoners of the real murderers, the case is solved.
Allied spies and Nazi Agents insinuate themselves at a Scottish cottage (converted to a wartime hospital) with interests on an inventor's nearly perfected bomb sight.
The relatives of a rich old woman unsuccessfully try to have her declared insane, so they can divide up her money. To show them that there are no hard feelings, she invites them to her estate for the weekend so she can decide to whom she actually will leave her money when she dies. Soon, however, family members begin turning up dead.