Ben finds himself behind the wheel of a speeding stock car in 1976, but a terrifying threat from the future could sabotage the leap. Ben and the team risk everything to complete the mission.

At Princeton University in 1955, Ben must find a formula hidden by Albert Einstein that holds the key to nuclear energy before the Nazis get it. He's surprised to run into a familiar face on campus.

Ben’s next leap takes him closer to home than he ever expected. The team faces the ultimate showdown with Leaper X as they battle for the future of the Quantum Leap project and their lives.

Ben leaps into the body of a 1974 Baltimore firefighter and is unexpectedly reunited with his time-crossed love, Hannah, and her son, Jeffrey. Trapped in an inferno, Ben must save their lives.

When Ben leaps as far as Egypt into an undercover CIA agent caught in a dangerous game of international espionage, he must move quickly to save a woman's life.

When Ben leaps into one of five people in an elevator at a 1962 nuclear reactor, he must figure which one triggers a bomb that kills them all. Each time the bomb goes off, he leaps into another one of them an hour earlier, resetting the scene.

When Ben leaps aboard a 1970s passenger jet as a flight attendant, he must outwit its hijackers before it mysteriously crashes into the Atlantic, and worse, he has to do it all without Ziggy’s help.

Now a government agent, Ben investigates unexplained extraterrestrial activity. After a mysterious incident in New Mexico, two young girls' lives are on the line. Ben meets Hannah Carson, who may be more than she appears.

When Ben leaps onto a naval battleship during war games in 1989, he must not only navigate a dangerous rescue mission but also contend with his commanding officer, XO Alexander Augustine, otherwise known as Addison's father.

When Ben leaps into a bounty hunter escorting the world's most slippery criminal, a deadly pursuit forces them to go into hiding; but Ben quickly realizes this leap is more than meets the eye. Addison faces a difficult decision.

When Ben lands in a 1950s psychiatric institution, he must engineer a daring escape for a young woman unjustly committed by her husband. Meanwhile, the team is shocked to learn the identity of a mole in Quantum headquarters.

Ben leaps to 1980s Los Angeles and into the body of Eva Sandoval, a no-nonsense bounty hunter in the midst of securing an elusive target. Ben remembers more about his own life.

Ben and Addison find themselves in San Francisco during the historic 1989 earthquake. As the city continues to crumble with aftershocks, Ben must try to mend a family in chaos as Jenn and Ian search for clues to an unsettling mystery.

Ben leaps into a priest who has been called to assist a family in crisis on Halloween night; as he delves into mysterious and inexplicable events, he's forced to muster all his resources as a scientist before time runs out.

Ben lands in 1979 Chicago as Jack Armstrong, a devoted security guard to talented pop singer Carly Farmer. During Carly’s prep for a concert, it quickly becomes clear her life is in danger and Ben must determine who is trying to kill her and why.

Ben leaps into Alexandra Tomkinson, a medical resident in a Seattle hospital. As victims from a train crash pour into the ER, Addison reveals Ben’s complicated mission, he must go up against hospital bosses to save lives and Alexandra’s career.

Ben takes on the role of a bank teller in the wrong place at the wrong time during a dangerous armed robbery. Addison, Magic, Ian and Jenn come to terms with a shocking discovery. The team adds a new member.

An anonymous source sends Ben and an experienced local Denver TV journalist on the trail of a dangerous conspiracy as they pursue the scoop of a lifetime in the early '80s. There's trouble at HQ when Ian's past decisions come back to haunt the team.

Ben leaps into the body of a 16-year-old boy and finds himself among a group of outcast teens on the run. Ben relies on determination to try and guide himself and Addison to safety, all leading to a shocking revelation as a significant piece of his memory returns.

Instead of leaping home as expected, Ben finds himself in 1978 aboard a top-secret military flight, transporting a mysterious cargo. When the flight comes under attack, Ben and the crew discover the sobering truth behind their mission.

Ben leaps to flashy 1970s Las Vegas and into the body of promising young boxer Danny Hill on the eve of a big title fight. Ben and Addison must help Danny win the fight or lose everything. Magic, Ian and Jenn dig into Ben’s past to uncover the truth.

When Ben leaps into an Indian family to try to prevent their beloved family restaurant from burning down, he finds an emotional connection with their matriarch through memories of his own. Magic and Jenn share a surprising revelation with Ian.

Ben leaps into the body of an ambitious Hollywood assistant whose famous client, Neal Russell, is in danger. As Ben realizes that Neal's circumstances may shed light on his own, his working relationship with Addison reaches an inflection point.

When Ben leaps into a harried public defender, he must keep an innocent teenager accused of murder out of prison for life. In an unexpected turn of events, Jenn puts her legal expertise to the test as she steps in as the hologram.

Ben finds himself headed into orbit aboard the Space Shuttle Atlantis in 1995. Addison confides to Ian about a discovery and finds herself at odds with Magic and Jenn.