The Enterprise is badly in need of repairs and Grey has to lease it to former riverboat captain Nick Logan. Nick Logan and his fiancée get to use it for two months, and they avoid telling Grey that they''re turning it into a crooked casino ship.
A noose is about to tighten around Carney's neck. Visiting his brother in Wingate, the riverboater is charged with murder.
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, and the colonel commandeers the Enterprise into transporting the Indians.
The Enterprise makes a wood stop at a small river town. But there is no wood for sale to strangers and night riders have terrorized the town into complying.
A young man aboard the Enterprise has been accused of murder by his dying father. An aroused posse sets out to drag him off the Enterprise and serve up their own brand of justice.
The crew of the Enterprise plan a big night on the town when they arrive in Green City. But when they dock, they find the place completely deserted except for three new graves.
Captain Brad Turner continues captaining the Enterprise and supervises the delivery of four cannons to Ft. Wilson. However, the commanding officer has taken heavy losses after setting off a war with the Sioux, and impresses Brad and the crew into fighting for him.
With Grey away on business, Brad Turner is hired to fill in and pick up a cargo of beaver pelts. On their way to meet Grey, Brad and the Enterprise crew soon become involved in stopping what appears to be a series of Indian raids.
Grey 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.
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 nephew before he is killed. The boy heads up river on a raft to deliver it to his other uncle, and the Enterprise picks him up.
A trip to Independence, Missouri brings back memories of a bitter adventure to Grey Holden. Holden tells the story to Chip and Joshua.
Louise Harrison and her boyfriend, the only survivors of a ship tragedy, do some quick thinking. Realizing that a fortune in pearls went down with the ship, they appeal to their rescuer, Grey Holden, to help them retrieve Louise's "dowry." Grey agrees in return for half of the pearls, and soon finds himself up against the salvage pirates who sank the ship in the first place.moreless
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.
Grey and his crew get into a barroom brawl over Martha Crane and land in jail. Martha, who set up the fight, agrees to bail them out on the condition that Grey will transport a supply of gunpowder up river to her father.
The Enterprise, tied up overnight, is boarded and hijacked by a vicious crew, who kill the three men left to guard the boat. Grey and the crew return to the scene in time to see their craft heading down the river, and hire a guard to travel overland to head her off.moreless
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 Marchand, one of the teachers, to return to the United States to raise a ransom for the rest. She makes her way to New Orleans and tries to convince Grey to help her raise the money.moreless
The Enterprise steams upriver with a cargo of arms and recruits for the Fort Union outpost. At Atkin's Landing, Grey Holden is told by Homer Atkins that the Sioux have been watching the boat and are planning an uprising.
Anthony Lorrimer charters the Enterprise to deliver a cargo of farm machinery to his thriving community of Lorrimer City. Ben is unaware that the cargo is actually arms and ammunition, while Lorrimer has Grey abducted to make sure that Ben cooperates when he does find out.
Actress Lorna Langton wants to charter the Enterprise and a skeleton crew for a trip to St. Louis. The actress has been told that her young son, kidnapped some years before, is being held in another town.
Lt. Perry Quinn, an officer in Sam Houston's Texas Army, hires the Enterprise to deliver a cargo of lead down river. Grey is unaware that Perry's mother Jessie is aboard the ship to supervise the shipment... as is her older son Beau, who hates his family and is working for Santa Ana to stop the lead shipment.moreless
Tommy James, 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.
Prison guard Kester captures escaping prisoner and former doctor Paul Drake and transports him back via the Enterprise. Paul wants nothing to do with anyone... until a young passenger is stricken ill.
French-Spanish playboy Andre Devereaux has become an American lieutenant to avoid an angry husband. His superiors put him on the Enterprise and send him and his platoon into Indian territory, and Andre discovers that someone is provoking the normally peaceful Indians into violence.
Otto Justin, dealer in wild animals, is escorting a shipment of his captured beasts to St. Louis aboard the Enterprise. Widow Abby Saunders and her young son Paddy are both impressed with Justin's manner, but are unaware of the true reason that he's on the ship.
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.
Ansel Torgin hires the Enterprise for his daughter's wedding. However, Grey recognizes the bridegroom, Chris Slade, as a convict who escaped the ship when it was hired to run a prison transfer. Things get complicated when Chris inadvertently kills the brother of a crime lord, Shelby Fowler, who has been terrorizing Ansel and the other local farmers.moreless
River pirate John Murrell plans to hijack a shipment from carpenter Dan Sampson. Murrell arranges to have Lela Russell take a job on the Enterprise as a dancing girl so that she can feed inside information to the pirates... and because Lena was romantically involved with Dan three years ago when she secretly betrayed him.moreless
John Jenkins has placed a large down payment on land owned by three ruthless farmers. Jenkins is planning to deliver a shipment of peaches, via the Enterprise, to Cincinnati, as a final payment for the land. But the farmers plot to block the boat so the shipment of peaches will spoil.moreless
Wealthy Roger Mowbray's marriage is threatened when an old sweetheart tells his wife Jeanette that Roger married her for her money. Roger is doubly upset to discover that his father is involved in a scheme to cheat his father-in-law.
Young Jefferson Carruthers has been assigned to a new post as an Indian agent. He and his wife board the Enterprise to travel to their new home. Also on board is Vance Muldoon, who plans to offer Carruthers money if he will smuggle liquor to the Indians.
The simple-minded Hunk Farber tells the police the whereabouts of his friend and boss, Monte Loman, who accidentally killed a senator's son. Hunk believes that they'll arrest Monte and protect him from people out for revenge. He takes the reward money and heads for Captain Holden's riverboat, eager to get his departing girlfriend back. However, Hunk soon learns that the police killed Monte and is consumed with guilt.moreless