Yancy Derringer (Jock Mahoney) gets involved in adventures in New Orleans after the end of the Civil War. Besides being a gambler, Derringer also worked as a troubleshooter for city administrator John Colton (Kevin Hagen). He was assisted in his endeavors by a Pawnee sidekick (X Brands).
Yancy wins enough money playing poker to pay for his return home to New Orleans. The losing players decide to rob him of his winnings, but he escapes on a riverboat.
Yancy and Pahoo are framed for a series of crimes, and now face execution.
Yancy is sentenced to hang for killing a man in a duel.
Trying to stop some gun smugglers, Yancy has a run-in with a boxing champion and a re-match with a female river pirate.
Yancy is at a loss to figure out what's going on when a marshal he knows charges an old wartime friend with murder.
Yancy helps a sea captain who was cheated out of his money in a dive on notorious Gallatin Street.
City administrator Colton entrusts Yancy with an army payroll that is to be taken to Natchez on Yancy's riverboat, the Sultana, but robbers have other plans.
An Irish girl visitng New Orleans decides that Yancy is to be her future husband.
A wealthy but lonely man who has come to New Orleans looking for a wife asks Yancy to help him.
Yancy is relieved to find that a newspaper story about administrator Colton's death is premature, but fears that Colton will be the victim of trickery in an upcoming duel.
After administrator Colton hangs a member of an outlaw gang, the others decide to take revenge on his visiting sister.
An army officer with vengeance on his mind tries to stop a presidential pardon from reaching a man who is scheduled to die before a firing squad.
Yancy must deal with a female pirate whose gang has stolen a valuable necklace from representatives of the Mexican government.
To assist a woman in her crusade to provide a home for the city's orphans, Yancy comes up with a scheme that requires the aid of photography pioneer Matthew Brady.
Yancy decides to help a fellow riverboat owner whose fleet is being sabotaged by rivals trying to corner the market on river traffic.
When famed General George Armstrong Custer visits New Orleans, Yancy discovers that he is being stalked by an Indian seeking revenge for a past wrong.
Winning a half interest in a silver mine while visiting Virginia City, Yancy discovers that his new partner is a beautiful woman.
A landowner comes up with a risky scheme to protect her property when it is threatened by flood waters.
With a serial killer loose in New Orleans and the authorities seemingly powerless, a group of vigilantes decides to take action before any more prominent women are murdered.
Yancy suspects foul play when a lottery winner dies before she can collect.
Merchants are in such fear for their lives that Yancy gets no cooperation in his attempt to break a new protection racket.
A mysterious mad bomber steals explosives and threatens to blow up the entire city of New Orleans.
Villains go after Yancy's dog after Yancy's father dies leaving a note that only the dog knows where the family pre-war fortune is buried.
Yancy tries to find out who's responsible for recent grave robberies.
Shop owners receive threats of violence if they refuse to sell their property to three strangers.
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