Mary Ellen gets hooked on pills while studying for her nursing license.
Elizabeth witnesses supernatural events.
Erin develops a friendship with an artist who is living in an abandoned mansion.
John and Olivia suspect that Corabeth may be an alcoholic.
A midget promises his dying wife that he'll give up the circus and settle down to raise their infant daughter.
Walnut Grove residents try to rescue a hearing-impaired boy who's unable to speak after they see him on display at a carnival show.
Dr. McQueen learns of young Matthew's whereabouts and seeks custody of him.
The Olesons are thrilled about Nellie's visit, but they don't know how to handle their newly adoped daughter Nancy's jealousy.
Walnut Grove residents are thrilled that the railroad will pass their small town, bringing career opportunities along - until they learn struggling farmers will be forced off their land as a result.
Sully and Preston oppose the construction of a dam ? but the law, in the form of Matthew, stands against them.
Mike receives a surprise visit from her beloved uncle, a pianist who still quietly grieves for the son he lost at Gettysburg.
Kid Cole and Sister Ruth are escorting mail-order brides to California, where, Mike learns, the couple intend to divorce.
Mike recalls significant medical cases (via clips from previous shows) for the benefit of Colleen, whos writing a paper for college.
Sullys best friend comes into town and pays off the bank loan Sully and Mike are worrying about, causing tensions all around town.
Mike, Brian and baby Katie are held hostage at the homestead by a pair of bank-robbing brothers.
Poet Walt Whitman visits Colorado Springs, but when townsfolk hear rumors about his sexual orientation, they shun him.
When Horace makes a suicide attempt after signing his divorce papers, Mike prescribes a visit from Myra and his daughter as an antidote for his melancholy.
Mikes suffragette sister shares her passionate feelings with Loren in more ways than one.
Feeling neglected, Brian acts out in adolescent fashion. Meanwhile, Andrew sells a specious remedy for the resort clinic.
After soldiers give Cloud Dancing a severe beating, Sully plots an escape for the tribespeople on the reservation.
Sully and Cloud Dancing are on the run from the Army after the reservation rebellion.
Sully struggles to survive in the wilderness after the reservation revolt and Mike is determined to find him.
A college-educated black woman returns home embittered by her lack of success.