Young David Morton, heir to millions, has been over-zealously restrained from normal youthful activities by his two old-maid Aunts, Harriet and Agatha. In an outburst from his confinement, he meets lovely Gertrude, and promises to race her injured-brothers car in the Big Race. Between the gangsters trying to win the race by disabling him, and his bungling bodyguards trying to bring him home safely, David has a battle to win the race and Gertrude's heart.
Holmes, retired to Sussex, is drawn into a last case when his arch enemy Moriarty arranges with an American gang to kill one John Douglas, a country gentleman with a mysterious past. Holmes' methods baffle Watson and Lestrade, but his results astonish them. In a long flashback, the victim's wife tells the story of the sinister Vermissa Valley.
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.
Charlie's visit to Paris, ostensibly a vacation, is really a mission to investigate a bond-forgery racket. But his agent, apache dancer Nardi is killed before she can tell him much. The case, complicated by a false murder accusation for banker's daughter Yvette, climaxes with a strange journey through the Paris sewers.
A doctor who has spent his career working on ways to revive the dead sees his chance to prove his theory by performing his procedures on a recently deceased dog.
A respected war correspondent is found murdered, with three bullets--from three different guns--in him. Three different men are arrested, convicted and sentenced to death for the murder, but only one can be the actual killer. A criminologist sets out to find who is really guilty.
A reporter itching to get off the boring gardening "beat" gets a chance to investigate a series of arson fires that have been plaguing the city. He believes the fires are tied into a web of political corruption involving a wealthy businessman, the mayor and the police chief. Complicatins ensue when the girl assigned to help him turns out to be the businessman's daughter.
Gangster Chandler and his accomplice Tracy arrive at a dude ranch. Cowboy Kentucky arrives at the same time. When Tracy double-crosses his boss and has the stage robbed, Kentucky finds the outlaws and brings them in. Tracy frames him for the murder of the driver but his pal Cactus gets him out of jail. He returns just as Chandler shoots Tracy and Kentucky finds himself arrested for another murder.
A recently released prisoner lives alone in his cabin so that his bad temper won't get him back in any more trouble, but his peaceful existence is disrupted when a mysterious woman arrives.
A valuable gem from India is stolen in an old dark mansion and it is up to Scotland Yard inspector Charles Irwin to find out who did it among all the suspects who were in the house.
After Sheriff Ken puts money in the safe, his brother Clem gives Rawhide the combination. With the money gone the disgruntled townsmen make Boots Sheriff and lock up Ken. Clem, now a prisoner of Rawhide, has a change of heart and sends Ken a message with the outlaw's location. Ken escapes by impersonating the saloon entertainer and rides for the hangout.
When a radio star is found murdered in her home, everyone assumes that the mysterious young woman discovered with her is the culprit — everyone, that is, but newspaper reporter Jerry Beall, who sets out to prove her innocence.
Twelve renegades dressed as Indians kill the parents of two brothers. The brothers who have similar birth marks then separate. Ten years later a man known as the Rawhide Terror is murdering the renegades who are now town citizens. Everyone is after the Rawhide Terror and the two brothers are destined to meet again.
Jury foreman Edward Weldon's questioning leads to the death sentence for Ethel Saxon. His daughter Stella claims to have killed her lover, the gangster Garboni, just as Saxon was to sit in the electric chair.
Nora Moran, a young woman with a difficult and tragic past, is sentenced to die for a murder that she did not commit. She could easily reveal the truth and save her own life, if only it would not damage the lives, careers and reputations of those whom she loves.