A delivery boy for a flower shop, who thinks of himself as an amateur detective, finds out that his boss is mixed up with a foreign espionage ring.

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.

Mismatched travellers are stranded overnight at a lonely rural railway station. They soon learn of local superstition about a phantom train which is said to travel these parts at dead of night, carrying ghosts from a long-ago train wreck in the area.

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.

Two friends take jobs as truck drivers, unaware that the trucking company is being targeted by a gang of saboteurs who will stop at nothing, including murder, to stop them.

Although young and beautiful, schoolteacher Anne Gladden fears a dull future. She finally decides to take a walk on the wild side, splurging on some fashionable new clothes and setting off to find adventure. Her new confidence inspires her to flirt with complete strangers. When a gangster pays unwanted attention to her, she ditches him and flees in his car, unaware that there's a corpse in the trunk. Determined to recover his stolen vehicle and its incriminating cargo the thug begins a desperate search. The oblivious Anne, comes to the aid of a handsome young man stranded alongside the road. Romance blooms, but after the shocking discovery of a body in the trunk, the duo decide they have to return the car. The bickering lovebirds head back to the city, trailed by both the angry gangster and the cops, who suspect the young couple of murder.

A honeymoon couple in New York for one night of wedded bliss before he's to join the army, become involved with gangsters after they find a cadaver under their bed.

When a landlady finds one of her tenants murdered, Inspector Hornleigh is sent to investigate. Inspector Hornleigh's assistant, Sergeant Bingham, soon finds an attaché case that had been stolen from the murdered man. When Hornleigh examines the case, inside it he finds a bag that was used to carry important government documents. The documents have been taken, and to make things even more confusing, a duplicate of the stolen bag soon turns up.

After one member of their group is murdered, the performers at a burlesque house must work together to find out who the killer is before they strike again.

An operation of counterfeit five pound notes is discovered at a variety theater, leading to murder during the performance.

While participating in a contest at a local newspaper in which school children are asked to submit a news story, local attorney Carson Drew's daughter Nancy intercepts a real story assignment. She "covers" the inquest of the death of a woman who was poisoned. Nancy doesn't think the young woman accused of the crime is guilty and corrals her neighbor Ted into searching for a vital piece of evidence and stumbles onto the identity of the real killer.

When an escaped circus gorilla appears to have gone on a murderous rampage, a threatened attorney calls on the detective trio of Garrity, Harrigan and Mullivan to act as bodyguards. In short order, we discover that there is more to the attorney than meets the eye, and the ape may be innocent after all. When a pretty young heiress faces peril, it's up to our heroic trio to save the day.

A dark night in war time, with several black-outs, it's just a night for murder. Susan Cooper, a fast-talking girl reporter, doubles as amateur sleuth solving yet another mystery among Hollywood's famous.

Newlyweds Webster and Jackie Frye spend their honeymoon in a sinister old country house. Before long, they are besieged by a gang of crooks, searching for a fortune in diamonds. With the help of chauffeur Harmony Jones, the honeymooners attempt to outsmart the villains.

Topper is once again tormented by a fun-loving spirit. This time, it's Gail Richards, accidentally murdered while vacationing at the home of her wealthy friend, Ann Carrington, the intended victim. With Topper's help, Gail sets out to find her killer with the expected zany results.

An insurance salesman, Albert Tuttle, is hired as a body guard for a millionaire.

Trouble begins when a hated cad of a sponsor is found murdered during the climax of a live radio show. A radio engineer then tries to solve the murder.

A young woman, a trio of singers, and a mystery writer are among the guests at a house long-considered to be haunted.

Convinced that she has what it takes to be a detective, inquisitive secretary Kitty O'Day gets her chance to put her sleuthing skills to the test when her investment broker boss is mysteriously murdered. But Kitty's investigation hits a snag when Inspector Miles Clancy begins to suspect that she's the culprit.

Two reporters search for a missing body in a wax museum.

A feud between rival newspapermen Kruger (Bromberg) and McDonald (Guilfoyle) goes deadly when blackmailing McDonald ends up murdered and his corpse planted in the trunk of Kruger's car. Good guy Kruger attempts to hide McDonald's body, with the help of chauffeur Hogan (Jenks), to keep from being charged with murder. However, zany scenarios occur as the body just won't stay hidden, and keeps on popping up in multiple places where Kruger is located, leading to him hiding the body again and again while Kruger tries to find the real killer.

A meek reporter happens upon a murder, an escaped gangster and a stolen jade chess set.

A pair of detectives investigates the murder of an elderly millionaire who was the target of blackmail and death threats and find that there is no shortage of suspects, many of them in the victim's own family.

Ronnie Jackson is a lowly baby photographer who secretly fantasizes about being a private detective. When a lovely baroness actually mistakes him for one and asks him to help locate her missing husband, Baron Montay, Ronnie finds himself agreeing. Several days later he is on death row whiling away the hours until his execution by recounting to a group of reporters the bizarre tale of how he ended up there.

Hard-boiled newspaper reporter Larry Doyle (Robert Armstrong) goes a bit too far in celebrating a work bonus and wakes up on a train bound for St. Louis with only a buck on his person. To remedy the problem, Doyle pawns the revolver he's carrying. When the gun is subsequently used in a murder, Doyle's problems only multiply. In the meantime, he's also fallen in love with a comely stranger (Maxine Doyle) he convinced to impersonate his wife.

A woman is married to the son of a doctor, the proprietor of a private sanatorium, where she is under unwilling treatment. Both the son and the doctor indicate they want the marriage dissolved. Arriving at the scene is a mysterious personage identified as the doctor's brother who formerly was a stage magician in Europe. He is accompanied by a threatening dwarf...

Susan Hart, assistant to private detective Russ Ashton, is given a camera concealed in a hat box and assigned to take a picture of a woman. A gun is accidentally hidden in the box and the woman is killed. Susan is charged with murder, but Russ and his less-than-useful associate, Harvard, get on the case.

Underworld king Lee Lother has been killed aboard a ocean liner, several people could have been the murderer. There is his mistress Anya Roysen, a married woman, who was jealous of his flirtations with his old moll, night club singer Sally Marsh, who had agreed for one last night with Lother, to get her younger brother Ned out of the Lother's clutches because he has faked Lother's name on a check to pay his gambling debts. Then there is Sally's new flame Jimmy Brett, a con man and gentlemen thief, who has out-tricked Lother in a fixed poker game, and is, together with shorty, after the ladies jewels. Inspector McKinney suspects Joe Saunders, a recently released convict, who was arrested due to some tips by Lother, but Ned and Sally insist that they committed the crime alone.

When a movie actor is shot and killed during production, the true feelings about the actor begin to surface. As the studio heads worry about negative publicity, one of the writers tags along as the killing is investigated and clues begin to surface.

Bodies start mysteriously disappearing from the city morgue. An investigator tries to determine what is going on.