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.

Mike's ex-fiance, whom she thought died in battle, comes to town forcing her to choose between him and Sully.

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 mayoral candidacy sparks a debate on women's rights; Myra is assaulted by a customer Hank wanted her to entertain.

Michaela is kidnapped by the dog soldiers, and Sully vows to find her before she is killed.

Blaming Mike for leading Custer's troops to them, renegade Indian soldiers abduct her; Sully vows to find her before she is killed.

Mike suspects the new teacher, a good friend, abuses students; the Rev. Johnson is torn by feelings for the woman.

A Denver banker brings the Ku Klux Klan to Colorado Springs to find new members and force Robert E to leave his home.

Dr. Mike clashes with Dorothy when she acts to protect her family from her friend's desperate son, who is addicted to morphine.

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.

Sully and Michaela scout for information that will prevent further bloodshed when the Buffalo Soldiers arrive to confront renegade Indians.

Matthew, Colleen and Brian feel neglected when Dr. Mike and the Rev. Johnson search for families that will adopt orphans.

Mike's patient, a woman wounded during a massacre, falls for Sully; Loren thinks Dorothy is seeing more of Jake than him.

When a woman brings her traveling circus to Colorado Springs, both Matthew and Dr. Mike try to help her self-conscious daughter.

Mike feels responsible for typhus transmitted to the Cheyenne through government-issued blankets she urged them to accept.

A cave-in traps Matthew, bringing Sully to the rescue; Loren refuses credit to strikers, prompting a boycott of his store.

While caring for a pregnant woman on Christmas Eve, Dr. Mike is visited by the spirit of Charlotte Cooper.

When a misunderstanding leads the cavalry to place a bounty on Sully, Matthew, Colleen and Brian hide their injured friend.

On the eve of the Sweethearts Dance, Mike sees Sully with Dorothy, and Colleen is accused of stealing a friend's boyfriend.

When Colorado Springs is hit by a severe drought, Jake and Loren put the townspeople in danger by stealing water from the Cheyenne.

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. 

In Boston to care for her ailing mother, Mike meets a doctor; Sully follows, wondering whether he should fight to win her.

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.

When Jake is accused of killing a Cheyenne, the divided town depends on Sully's peacemaking ability to avoid retribution.

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.

Dr. Mike must use medical evidence to prove Loren's sister-in-law did not murder her abusive husband.

Rules forbid Mike from entering her horse in an important race; Brian faces discrimination in a cooking contest.