Quantum Leap (season 3)

Sam leaps into himself as a 16-year-old boy and Al tells him he is there to win a basketball game that was a turning point in many people's lives, but Sam wants to take the opportunity to prevent his sister from marrying an abusive alcoholic, his father from dying from a heart attack, and his brother from getting killed in Vietnam.

Sam leaps into Herbert "Magic" Williams (Christopher Kirby), a soldier in his brother's platoon in the Vietnam War, where he is given the chance to keep his brother from dying, but at a terrible price.

Sam leaps into horror novelist Joshua Rey (Chris Ruppenthal) who is surrounded by death and mystery. Al and Ziggy don't seem to be able to predict what will happen and Sam is running out of suspects.

Sam leaps into an African-American named Ray Harper (Garon Grigsby), a medical student dating a white woman on the day of the Watts riots. He must prevent his host's girlfriend from being killed, while persuading her that they need to stay in Watts.

Sam leaps into Shane "Funny Bone" Thomas (Kristopher Logan), a member of a biker gang where he meets a truck stop restaurant owner who lost his son to the war and an idealistic young woman who is going to die unless she gives up her reckless dream of living the hard life of Jack Kerouac.

Sam leaps into Reginald Pearson (Milan Nicksic), a personal valet to a Scrooge-like industrialist who is bent on demolishing a Salvation Army mission, forcing Sam and Al to 'Scrooge' him by showing him his past, present and future in an attempt to change his mind.

Sam leaps into Butchie Rickett (Buff Borin), a 13-year-old boy who is on a family roadtrip from which the mother will soon disappear, while also dealing with the bullying of his host's older sister.

Sam leaps into Billie Jean Crockett (played by Priscilla Weems), a pregnant teenager who needs to keep her baby and obtain the support of her father, a fact made all the more confusing by the fact that Sam seems to be pregnant even though he lacks the 'equipment' to carry a child.

Sam leaps into Gilbert LaBonte (played by Richard White), the owner of a New Orleans brothel to prevent one of his girls from disappearing after a confrontation with her abusive husband.

Sam leaps into Terry Sammis (a.k.a. "Nikolai Russkie" and played by Jeff Hochendoner), a professional wrestler who must prevent his brother from dying of a heart attack in the championship match.

Sam leaps into Eddie Elroy (Patrick M. Bruneau), a college student helping his brother sell nuclear bomb shelters during the Cuban Missile Crisis, and must prevent their neighbor from being shot during a false air raid.

Sam leaps into Sam Beiderman, a depressed mental patient who receives shock therapy as soon as Sam leaps in. This causes Sam's personality to become displaced, resulting in his assuming the identities of people he has leaped into before. It's up to Al to complete Sam's mission by helping a mentally challenged young man learn how to read, which he is able to do when he discovers that he and Sam can be seen by mentally ill people. He must also find a way to restore Sam's personality so he can leap, or else risk losing contact with him forever.