Dr. Michaela Quinn journeys to Colorado Springs to be the town's physician after her father's death in 1868.
After her father dies, Mike leaves Boston for Colorado Springs, where she sets up practice and adopts three orphans.
While trying to stave off an influenza epidemic, Dr. Mike falls prey to the deadly virus, leaving the town in jeopardy.
Dr. Mike's disapproving mother visits from Boston and finds her daughter's unconventional life on the frontier difficult to accept.
Dr. Mike hires a retired gunslinger as sheriff to save the life of an orphaned immigrant who stole a cow to feed his starving family.
A bitter Loren, who blames Sully for his daughter's death, tries to repossess Dr. Mike's cabin when he learns he still owns the deed.
Dr. Mike is suspicious when Charlotte's husband returns to the children he abandoned and tries to convince the town that he has changed.
Dr. Mike threatens a wealthy mining baron when mercury from his mine contaminates the town's water supply and causes illness in the community.
When a medicine-show man arrives in town, selling an elixir he claims will cure anything, Dr. Mike becomes determined to prove him a fraud.
A thieving cowhand rides into town and quickly disappears after robbing Loren's store and leaving his sick baby with Dr. Mike.
When Sully is beaten and left for dead by skinners who are slaughtering buffalo, Dr. Mike fears he may be paralyzed.
After Gen. Custer injures Cloud Dancing and sentences him to hang, Dr. Mike and Sully orchestrate his escape.
A lonely Dr. Mike believes the whole town feels sorry for her as she prepares to celebrate another birthday as an unmarried woman.
Dr. Mike is at odds with Matthew when he announces his decision to forgo a university education and marry Ingrid.
Influenced by romance novels, Colleen develops a crush on Sully and endangers her life when she sets up a situation in which he must rescue her.
Dr. Mike is forced to operate on Brian after he suffers a severe head injury; the townspeople argue over the construction of a new school.
When one of Dr. Mike's patients dies and leaves behind an illegitimate child, Hank is forced to admit he is the boy's father.
When a famous Civil War photographer arrives to take a town portrait, he is delayed by bickering, and Dr. Mike discovers he is going blind.
Rules forbid Mike from entering her horse in an important race; Brian faces discrimination in a cooking contest.
Dr. Mike must use medical evidence to prove Loren's sister-in-law did not murder her abusive husband.
It's Halloween and the residents of town are getting spooked by a vision of a man who mysteriously appears and disappears in various parts of town. Meanwhile, Dr. Mike receives a visit from Sully's deceased wife that causes her to rethink her relationship with him, and after talking with some friends at school, Brian starts to suspect that Dorothy is a witch.
When Jake is accused of killing a Cheyenne, the divided town depends on Sully's peacemaking ability to avoid retribution.
Dr. Mike clashes with a faith healer over the necessity of Kid Cole's treatment; Robert E and Grace encounter problems when they plan to marry.
In Boston to care for her ailing mother, Mike meets a doctor; Sully follows, wondering whether he should fight to win her.
Michaela "Mike" Quinn heads back to Boston upon word that her mother is seriously ill, and Sully's arrival causes a stir in Boston, where Mike is feeling at home.
When Colorado Springs is hit by a severe drought, Jake and Loren put the townspeople in danger by stealing water from the Cheyenne.
On the eve of the Sweethearts Dance, Mike sees Sully with Dorothy, and Colleen is accused of stealing a friend's boyfriend.
When a misunderstanding leads the cavalry to place a bounty on Sully, Matthew, Colleen and Brian hide their injured friend.
While caring for a pregnant woman on Christmas Eve, Dr. Mike is visited by the spirit of Charlotte Cooper.
A cave-in traps Matthew, bringing Sully to the rescue; Loren refuses credit to strikers, prompting a boycott of his store.
Mike feels responsible for typhus transmitted to the Cheyenne through government-issued blankets she urged them to accept.
When a woman brings her traveling circus to Colorado Springs, both Matthew and Dr. Mike try to help her self-conscious daughter.
Mike's patient, a woman wounded during a massacre, falls for Sully; Loren thinks Dorothy is seeing more of Jake than him.
Matthew, Colleen and Brian feel neglected when Dr. Mike and the Rev. Johnson search for families that will adopt orphans.
Sully and Michaela scout for information that will prevent further bloodshed when the Buffalo Soldiers arrive to confront renegade Indians.
Dr. Mike and Sully try to dissuade Matthew when a slick card shark teaches him to gamble and he believes he's found an easy way to make money.
Dr. Mike clashes with Dorothy when she acts to protect her family from her friend's desperate son, who is addicted to morphine.
A Denver banker brings the Ku Klux Klan to Colorado Springs to find new members and force Robert E to leave his home.
Mike suspects the new teacher, a good friend, abuses students; the Rev. Johnson is torn by feelings for the woman.
Blaming Mike for leading Custer's troops to them, renegade Indian soldiers abduct her; Sully vows to find her before she is killed.
Michaela is kidnapped by the dog soldiers, and Sully vows to find her before she is killed.
Mike's mayoral candidacy sparks a debate on women's rights; Myra is assaulted by a customer Hank wanted her to entertain.
Hank, distraught at Myra's decision to leave the business, gets drunk. In his rage he shoots up the town, and winds up under Dr Mike's care in a coma.
Mike's ex-fiance, whom she thought died in battle, comes to town forcing her to choose between him and Sully.
When Mike discovers that a visiting naturalist is actually her former fiancé, a man she believed to have died in the war, she is forced to choose between him and Sully.
Dr. Mike and Sully disagree over the changes the railroad will bring to Colorado Springs.
Loren plans a trip to Bolivia to prove he is not getting old; Brian seeks to prove his courage by camping out alone.
Matthew inherits a herd of cattle after Olive dies, and the townspeople help him drive the herd to Colorado Springs.
Matthew ignores Sully's advice about the land as he tries to prove his worth as a trail boss, but his inexperience endangers the lives of all those around him and leads to a stampede in which cattle are lost.
Mike donates her father's book collection to start the town library, touching off a furor over censorship.
Dr. Mike performs experimental reconstructive surgery on a disfigured man.
Mike, Sully and Cloud Dancing head to Washington, D.C., to lobby on behalf of the Indians; Sully is jailed as a deserter; assassins target President Grant; Mike's life is endangered.
In Washington, Dr Mike and Sully struggle to find anyone who'll listen to them. Michaela tries to break Sully out of jail, after he's arrested for army desertion, and expose a conspiracy against the president.
Mike's offer to pay for supplies needed to finish the new house threatens Sully's pride; Myra and Horace consult Mike about Myra's sleepwalking.
Mike feels responsible for friends who were robbed on the Denver stagecoach; the kids prepare Thanksgiving dinner.
Dorothy ignores Mike's advice after finding a lump in her breast; maturing Colleen endures ridicule from boys.
Dorothy insists the decision to have surgery is hers, not Mike's; Colleen finds the harassment unbearable.
When an immigrant Jewish family arrives in Colorado Springs just before Christmas, the residents of town start to question what having the Christmas spirit means to them.
Appointed by the government to represent Indian rights, Sully learns his supervisor is selling goods intended for the Cheyenne to local merchants.
The townspeople spend what they believe will be their last days on Earth in a state of panic after a newspaper reports that a deadly comet is coming.
Mike meets a kindred soul in an older woman who comes to climb Pikes Peak; Grace deals with her jealousy of Myra's pregnancy.
Mike and Sully attempt to adopt Brian and Colleen, but the arrival of their birth father and his wife complicates their plans.
Brian and Colleen flee so their father won't be able to take them away from Dr Mike and Sully. Dr Mike realises she has to let them go after they're discovered and Colleen has pneumonia.
Passions explode when the townspeople start casting a production of "Romeo and Juliet"; Dr. Mike and Sully try to plan a day alone.
Mike's faith in Robert E. leads her to recommend him for the dangerous job of repairing a steam engine.
After the visiting Belle Starr gets into a bar fight, she stays with Dr. Mike and disrupts her peaceful home life.
Dr. Mike and Sully try to stop a paleontologist who is digging up Cheyenne burial sites while searching for dinosaur bones.
Substitute instructor Mike gets in trouble for teaching evolution theory; Mike takes an abused girl under her wing.
Mike and Sully arrive too late to avert Custer's slaughter of the Cheyenne Indians.
Sully and the kids try to help Mike deal with the emotional aftermath of the Washita massacre.
Sully must overcome his spiritual crisis in order to save Loren, who has been critically injured in the wilderness.
Dr. Mike and Sully remember the events that have marked their love affair and have second thoughts about their impending nuptials (featuring past episodes).
Dr. Mike's mother and sisters arrive with elaborate wedding plans; Gen. Custer places a bounty on Cloud Dancing, Sully's best man.
The arrival of the railroad brings surprises for Dr Mike and Sully's wedding day.
Dr. Mike and Sully's return from their honeymoon is marred by the arrival of a greedy banker and Cloud Dancing's hatred of the reservation.
Baseball fever hits town when an all-star team arrives; the townspeople agree to split profits from a match with the traveling challengers.
Mike becomes more absorbed in her new role as wife; rebellious Colleen joins schoolmates for dangerous and questionable escapades
Matthew's fiancee, Ingrid, is making final wedding plans when she is attacked by Brian's rabid dog and becomes gravely ill.
Though an elderly patient believes the springs are helping him, Dr. Mike knows his improvements are psychological; Mike wants Sully to play Prince Charming.
Dorothy Jennings' book about her experiences in Colorado Springs becomes a best seller, but it angers townsfolk.
Loren proposes to Dorothy but has a stroke before she can answer; an old friend wants Sully to come to the gold fields.
Dr. Mike celebrates her birthday by climbing Pikes Peak with Dorothy, Grace and Myra, but ends up injured and alone when her companions turn back.
On her birthday, Dr Mike winds up injured and alone on Pike Peak after Dorothy, Grace, and Myra turn back on a celebratory climb. Preston decides to build a casino back in town.
Dr. Mike fears she is unable to have a child because of her age; the townspeople debate sharing their feast with the Cheyenne on the reservation.
Dr. Mike finds a heartbroken and self-destructive Matthew courting danger in a plague-ridden town.
Dr. Mike gets a mischievous poodle; Brian is smitten with a new girl in town; the Rev. Johnson recruits folk for a Nativity pageant.
Robert E wants to adopt a sick boy, but Grace is hesitant about becoming attached; Dr. Mike struggles to diagnose the child.
Matthew becomes sheriff of Colorado Springs, and his first challenge is a confrontation with an infamous gunslinger.
Matthew's grief finally gives way to a new romance, but his heart goes to a woman working for Hank in the brothel.
During Dr. Mike's absence, the residents of Colorado Springs become prey to a con man.
Sully leads the rescue when a boy is kidnapped by a mountain man; Dr. Mike's pregnancy is in danger when she does not take care of herself.
Sully leaves the unruly rescue party to hunt for Matthew on his own; Dr. Mike's least favorite physician takes over her practice.
When the Rev. Johnson finds his former mentor plans a visit, he borrows money from Hank to fix up his ramshackle church.
Capital punishment divides Colorado Springs when a man convicted of rape and murder is sentenced to die.
Cloud Dancing sees a reservation school as fatal to Indian culture; bankers stonewall Dorothy's loan request.
Dr. Mike's joyful reunion with a college friend soon turns competitive; Dorothy struggles with a new press.
After being nominated for Colorado's Woman of the Year, Dr. Mike finds it nearly impossible to live up to everyone's expectations.
A renegade stabs Cloud Dancing, and Emma has a tumor, so Mike cannot slow down before the baby is born.
The residents of Colorado Springs welcome an artist until they discover she carries a disease, causing Dr. Mike to face her own fears.
Cloud Dancing claims responsibility when a young soldier is inadvertently shot during a fight between the Army and the American Indians.
Dr. Mike prepares for the birth of her baby; Sully is hurt while trying to rescue Cloud Dancing and others from Sgt. O'Connor and his patrol.
Cloud Dancing leads pregnant Dr. Mike through the wilderness to Sully; Dr. Cook is forced to perform a major operation.
Robbers wreck a train carrying Sully and Cloud Dancing; Andrew is reluctant to return the practice to Dr. Mike.
Dr. Mike finds the stresses of being a wife, mother and career woman too much and contemplates turning her practice over to Dr. Cook.
A malpractice suit prevents Dr. Mike from practicing medicine, leaving the reluctant Dr. Cook in charge.
The appearance of renowned singer Gilda St. Clair tempts Colleen to leave college and travel the world instead.
A Latin American woman rebuffs Dr. Mike's attempts at friendship; the Rev. Johnson searches for a teacher to take his place.
Sully gets an offer to survey the newly created Yellowstone National Park; Brian's first date; Dorothy teaches Cloud Dancing ballroom steps.
Jake and Preston each want Mike's mayoral endorsement, until she is jailed for treating a fugitive Indian.
When a sick, old prospector wanders into town, Dr. Mike takes it upon herself to help reunite him with his family before it's too late after she tends to his ailments, one of which is the onset of dementia. However, she is unaware that Jake is the old man's son and he abandoned his family when Jake was still a child. After Brian announces that the prospector found a large nugget of gold nearby, Mr. Bray, Horace, and Hank catch gold fever.
Dr. Mike, Sully and Matthew team up with a legendary marshal in order to nab the thieves who wounded Matthew during a bank robbery.
A severe storm bears down on Colorado Springs, disrupting the arrival of Preston Lodge II and Dr. Mike's attempts to prepare a Thanksgiving dinner.
Robert E. and Brian try to enroll Anthony in the all-white school; Jake and Hank open a hotel to rival Preston's.
Dr. Mike's practice is in jeopardy when her patients begin dying of a mysterious infection apparently contracted at the clinic.
As Christmas approaches, Brian questions his faith when he learns that Dr. Mike cannot save the Rev. Johnson's sight.
In a case of mistaken motivation, a judge sends Sully to prison after he is spotted with criminals bent on stopping the construction of a dam.
Dr. Mike's Uncle Theodore, a concert pianist, sees in Brian not only a talented musician, but his own dead son.
Kid Cole and Sister Ruth visit Dr. Mike at a difficult time in their marriage.
Dr. Mike and Colleen recall past cases as part of a college course Colleen is taking; Andrew is overcome by a mysterious ailment. Features clips from previous episodes.
Sully's wealthy friend Daniel falls for Mike and humiliates Sully with an offer of financial help.
Sully is humiliated when his wealthy friend develops feelings for Mike, and presents them with an offer of financial help.
Despite being wounded by two bank robbers, Sully works to free his wife, Brian and Katie when they are taken hostage by the desperate men.
Brian takes a liking to visiting writer Walt Whitman, even when the townspeople shun Whitman over rumors of his alternative lifestyle.
Horace attempts suicide after his wife leaves him, prompting Dr. Mike to send for her and their young daughter.
Dr. Mike is shocked by her sister's liberal behavior and open relationship with Loren Bray after she joins the women's suffrage movement.
When Brian's irresponsible behavior puts the town in danger, Sully must step in and begin acting like a real father to the boy.
Defying government orders, Sully becomes a wanted man after he enters an American Indian reservation and helps Cloud Dancing escape.
When Sgt. McKay holds Sully responsible for the Dog Soldiers' attacks, he and Cloud Dancing escape to safer American Indian lands.
Daniel Simon and Dr. Mike search for Sully, who is dying in the wilderness from injuries suffered when he fled the Cavalry.
Dr. Mike keeps Sully's whereabouts a secret as she tries to help him recover from his wounds.
Hank, believing Sully and Cloud Dancing to be the instigators of the American Indian raids, declares himself sheriff and sets off to capture them.
With Sully still in hiding, Dr. Mike worries that she may be pregnant again, a secret that spreads quickly throughout the town.
Dr. Mike is shocked when a Russian princess convinces the townsfolk she is a seer with ties to the spirit world
Grace and Robert E.'s adopted son may not survive; fugitive Sully works for peace and learns of Mike's miscarriage.
Mike's sister Marjorie is a temperance crusader; Sully and Cloud Dancing try reasoning with Black Moon.
Mike sends the children to Sully's hideout, but her visiting family refuses to leave diphtheria-ravaged Colorado Springs.
Dr. Mike tries to protect her family from a diphtheria epidemic, but her mother and two sisters refuse to leave town.
Matthew's legal studies lead to a flurry of lawsuits after Horace seeks restitution from Hank for accidentally breaking his nose.
An Indian-hater determines to thwart a treaty that would allow Black Cloud's warriors safe passage and let Sully come home.
Returning from the reservation, Dr. Mike and Sully hope to make it home for Christmas, but are waylaid when they help a young couple lost in the wilderness.
Sully and the townsfolk worry about Dr. Mike when she begins having recurring nightmares after being shot by a man with a hatred of doctors.
Dr. Mike's dislike of Colleen's charming but rather aggressive boyfriend is validated when Andrew has to protect Colleen from abuse.
Dr. Mike tries to prevent grief-stricken Loren from moving away; the town prepares for the "Sweethearts Dance."
Dr. Quinn befriends a young Chinese woman who must pretend to be a man so she can practice medicine.
Teresa's aunt tries to stop her from marrying Jake; Dorothy wants to free Cloud Dancing and run away with him.
Dr. Mike learns that a strange but seemingly harmless man whom Brian has befriended is actually an escapee from an insane asylum.
Matthew defends lawman Elias Burch against charges that he murdered an unarmed ex-con.
Mike and Sully reminisce about ups and downs of their relationship when a head injury forces Mike to stay awake or risk a coma. * Another flashback episode featuring clips from past episodes.
After the death of his son and the breakup of his marriage, furious Robert E. fights a visiting boxing champion.
Medical student Colleen accepts Andrew's proposal; Preston offers to buy Jake's share of the Golden Nugget.
