As of July 2026, Quantum Leap Season 4 aired in 1991 with 22 episodes — streaming now on Philo. Full episode guide and where to watch below.

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Quantum Leap Season 4

1991 22 Episodes Sci-Fi & Fantasy · Action & Adventure ⭐ 8/10

Quantum Leap Season 4 has built a real following on among viewers who want their sci-fi to think as hard as it looks. A single, tightly-focused season means there is plenty to get through without ever feeling padded. With 774 viewer ratings on TMDB, this is not a title flying under the radar. Scott Bakula anchors it with a performance that grounds the bigger ideas in something human. Put it on tonight and see for yourself.

Quantum Leap Season 4 is not trying to be everything to everyone, and that focus is exactly what makes it work. The world-building is meticulous, but it is the characters who carry Quantum Leap Season 4 through its more ambitious moments. Season 4 of Quantum Leap includes 22 episodes. It aired from September 1991 to May 1992. This season stars Scott Bakula and Dean Stockwell. Scott Bakula and Dean Stockwell lead a cast that brings real weight to the material. It was aired in 1991. The world-building is meticulous enough to sustain multiple rewatches, with details early on that only make sense later. The consistency throughout is what elevates it — not every moment is the best, but none of them are a reason to stop watching.

Sci-fi fans who want ideas alongside the spectacle will find Quantum Leap Season 4 genuinely rewarding. It stands on its own even without an obvious comparison point. The complete run is available and best experienced without too much prior knowledge of where it goes. Scott Bakula anchors it with a performance that makes the more abstract moments feel personal. If you have been burned by ambitious sci-fi before, this is the exception.

📡 Where to Watch Quantum Leap Season 4

🇺🇸 United States

🎬 Quantum Leap Season 4 — Episode Guide

June 15, 1945: Struck by lightning, Sam and Al find their roles reversed, as Sam returns to the future, and to a long-lost love, while Al leaps back to 1945 to prevent the death of a returning World War II hero and his former girl friend.

August 6, 1961: A pitcher on a minor league baseball team, Sam must decide if he's there to help a fellow team member, get his host back into the major leagues, or baby-sit the porcine team mascot, all while resisting the amorous advances of the women in his life.

August 17, 1969: Sam meets Camille, and possibly a killer, when he leaps into a deputy sheriff in a small Mississippi town, lying in the path of a deadly hurricane.

May 11, 1965: Sam must don the robe of a Ku Klux Klansman in order to save the life of an ambitious young civil rights leader, who is trying to register black voters.

June 2, 1983: Sam leaps into Frank Bianca, a hairstylist in leather pants, to prevent the death of a young murder witness and his mother.

June 20, 1980: It's up to Sam to try to bring a rapist to justice when he leaps into the perp's victim, a young woman who may have been unwilling to press charges against the young man - the son of the pillar of the community.

The Wrong Stuff

January 24, 1961: The fates make a monkey out of Sam when he leaps into Bobo, an astro-chimp who must avoid succumbing to the experiments of an Air Force neurologist.

February 28, 1979: It's more like a nightmare when Sam leaps into a detective, investigating a gruesome murder. He may be next if he doesn't find out who eviscerated the victim and his only hope is the victim's catatonic son and her husband's psychiatrist. The horrific flashbacks he's experiencing d...

A Single Drop of Rain

September 7, 1953: A devastating drought will be the ruin of a small town unless Sam, as Billy Beaumont, "purveyor of precipitation and maker of rain," can find a way to make it rain, while keeping his family together in the process.

November 2, 1956: Sam and a fellow convict named Boone are the defiant ones when Sam has to rescue his companion from a fifteen-year sentence on a chain gang.

The Play's the Thing

September 9, 1969: May meets December when Sam leaps into a young actor in love with an older woman, who is also an aspiring singer. If he can't boost her confidence and help her get her career on track, she will face a "fate worse than death," returning with her son to Cleveland.

Running for Honor

June 11, 1964: As a track star in a Navy college, Sam must prevent the death of his ex- roommate, who was expelled because he was gay, and who is slated to die at the hands of a group of bigoted cadets.

Temptation Eyes

February 1, 1985: A serial killer stalks San Francisco while Sam as Dillion Powell, a TV reporter, protects a beautiful psychic who's working on the case, from becoming the next victim. The young lady is very clear of sight, as Sam and Al soon discover.

The Last Gunfighter

November 28, 1957: Sam finds himself in the life of Tyler Meanes, a teller of tall tales who faces death at the hand of an old friend in a shootout at high noon.

A Song for the Soul

April 7, 1963: As a backup singer in a black, amateur girl group Sam finds between the fifteen year-old lead singer and her father as he attempts to rescue the girl from a sleazy night club owner's clutches.

August 13, 1956: Flying over the Bermuda Triangle, Sam, as the co-pilot, must prevent the flight from returning to Virginia, to get a seriously ill passenger to a doctor before she dies. Flying through the triangle is riskier than it seems, and Sam, deprived of Al's help when the hologram fades out,...

January 27, 1982: Sam, as "Roberto!" is a tabloid talk show host a la Geraldo who, with an asthmatic rival and co-worker, tries to uncover a mystery at a local chemical plant, a mystery, which may prove to be deadly for his co-worker.

It's A Wonderful Leap

May 10, 1958: Sam finds himself behind the wheel of a New York taxicab, in the life of Max Greenman, a driver striving to win his own tag, a license to drive his own cab. His mission is aided with the help of a woman who claims to be a guardian angel.

Moments to Live

May 4, 1985: Sam is a soap opera heart surgeon and the obsession of a love-struck, if somewhat deranged fan. He must escape from the woman and her husband who kidnap him for reproductive purposes

The Curse of Ptah-Hotep

March 2, 1957: It's almost as though Sam were on vacation when, as Egyptologist Dale Conway, he gets to read hieroglyphics, search lost tombs, and, of course, visit Egypt. But between an encroaching sandstorm, computer glitches back at the Project, the suspicious deaths of the guides, and a 3000-yea...

🎭 Cast of Quantum Leap Season 4

Scott Bakula

Dean Stockwell

📋 All Seasons of Quantum Leap

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