A young passenger on the Enterprise has been accused of murder by his dying father. An aroused posse set out to drag him off the Enterprise and serve up their own brand of justice.

The Enterprise makes a wood stop at a small river town. But there is no wood for sale to strangers.

Milton Frome, Holden and Blake have an idea for making the Enterprise famous by shanghaiing President Zachary Taylor. They get some help from a girl named Lucy Belle.

Gentleman Dan Muldoon is backing Dublin Boy against Gunner Stagle for the bare-knuckle championship of the river. Before the fight, Dublin Boy proves to have a glass jaw, when flattened by Grey, thus forcing the captain to take his place in the ring. Grey triumphs and becomes ""river champion.""

There was no bridge on the river to Captain Holden's knowledge, but someone has constructed a railroad trestle over the water. When the Enterprise runs into its pilings, Holden sues for damages, finding himself in court against a young lawyer named Abraham Lincoln.

The feuding families of Jennings and Cox are going to a fair, and Holden unwittingly books both families on the Enterprise. Now Grey has to act as peacemaker or have the riverboat wrecked by gunfire.

Army Sgt. Dan Phillips is trying to recruit new members for his platoon. Using a convincing argument - a hit on the head - he has filled all but two spots in his quota. And he has eyes on Phelan, one of Grey's crewmen, for one of those spots.

Brian Cloud monopolizes all the cotton crop in the area, and Laurie Rawlings, the wife of a cotton planter, doesn't like being under Cloud's thumb.

If Grey will lure a belle named Lucinda away from Colonel Ashley's son Tony, the colonel will provide a profitable cotton cargo for the Enterprise. Unfortunately, Lucinda overhears the proposition.

Norwegian songbird Julie Lang wants to take her troupe to New Orleans for an engagement, but she has no money. Grey finally agrees to take the troupe aboard the Enterprise, for an IOU against their New Orleans receipts. Along the way, a future crewman of another famous ship called Enterprise, steals her jewelry.

An Army colonel warns the Cherokee to take the long trail to a new settling place. Pillagers burn the Indian village to make sure the Cherokee have no reason to stay.

Fast talking Martinus Van der Brig persuades Holden and Bill Blake, the riverboat's new pilot, to transport a group of pioneers to some new territory, recently purchased from Mr. Van der Brig.

Captain Grey Holden and his crew get into a street brawl over Martha Crane and land in jail. Martha agrees to bail them out on the condition that Grey will transport a supply of gunpowder up river to her father.

Laura Sutton is forced to kill her husband in self defense. Laura's brother-in-law, Jarrett Sutton, witnesses the shooting and tries to blackmail her.

A trip to Independence, Missouri brings back memories of a bitter adventure to Grey Holden. Holden tells the story to Chip and Joshua.

A noose is about to tighten around Carney's neck. Visiting his brother in Wingate, the riverboater is charged with murder.

Sir Oliver Garnett and Juliet, his young companion, are shipwrecked actors. Captain Holden fishes them out of the river and books them as entertainers aboard the Enterprise.

Grey Holden is chosen to represent riverboat captains in seeking a government-subsidized canal. Preliminary surveys and work must be completed before Congress will approve the project. Opponents of the canal set out to sabotage the project.

While the Enterprise makes a stop for wood, a group of Cajuns board the vessel and hijack a part of the cargo. Two people are shot during the incident.

Bank robbers have a falling-out over some hidden loot. One of the men manages to give a map of the hiding place to his son, before he is killed. The boy heads up river on a raft to deliver it to his uncle.

For a price, simple-minded Hunk Farber is only happy to reveal the whereabouts of his boss, Monte, who accidentally killed a senator's son. The reward in his pocket, Hunk heads for Captain Holden's riverboat. There he is eager to impress a young lady aboard the Enterprise.

Tommy Jones, a young stowaway, is discovered aboard the Enterprise. Also on board is a pair of thieves, who plan to blow up the boat to collect insurance on some diamonds they are shipping to St. Louis.

A group of volunteer teachers who have gone to the island of Diablo Corozan off the coast of Tampico are imprisoned when Spain conquers the island. The corrupt Spanish officials allow Joan Marchland, one of the teachers, to return to the United States to raise a ransom for the rest.

In town to have an aching tooth removed, Carney stops at the saloon for a bolstering drink. This makes him late for the dentist, so Blake undertakes to separate Carney from his tooth.

French playboy Andre Devereaux has become an American lieutenant. Assigned to lead some troops into Indian Territory, he finds that the normally peaceful Indians have been provoked to violence.