The President's briefcase containing the missile controls is lost on the streets of Washington D.C.

Teens playing video games are actually being used to pilot missiles.

When a supercomputer with artificial intelligence deactivates the U.S. nuclear weapons systems, Parker must take advantage of its infatuation with him.

Parker quits when a Backstep is cancelled that would have saved children on a subway train from being killed, and the team must question whether they obey NSA orders or act on their consciences.

A falling scaffolding hurts Parker, and as Olga keeps vigil over him in his coma, she professes her love for him just as he wakes up to hear her. Through an increasing series of dares they end up getting married . . . but all is not what it seems.

An alien implant cures Dr. Ballard's paralysis, but results in his mind being taken over by Adam, the Roswell alien (from ""Lifeboat"").

Parker backsteps to save Olga's sister, Svetlana, from the Russian mafia.

Parker Backsteps to prevent a collapsed dam from killing people, but when under the influence of alcohol lands in the middle of an execution, letting a serial killer escape. Frank insists on taking on the investigation to make up for his screw-up.

A wiring problem causes an explosion at the wedding of Princess Lisette, and Parker must Backstep to protect the Princess and Olga, after discovering terrorists were responsible.

Parker must Backstep to prevent a submarine from blowing up, and a U.S. cruiser in the area from triggering a nuclear war between China and the U.S.

Parker must prevent the Global Space Station from exploding in space and releasing large amount of plutonium into Earth's atmosphere...but due to the narrow threshold he must dock with it in space.

Parker Backsteps to stop Fidel Castro's son Teo, a boxer, from being murdered in his comeback fight - an incident that leads to Castro launching a nuclear missile strike on Miami.

Parker and Olga must recover a kidnapped baby created in a lab as part of a genetic experiment to breed super-geniuses.

Parker must Backstep to prevent Ramsey's younger brother, mentally ill and off his medication, from killing a Senator.

When the Pope is assassinated, a mixed-up Backstep occurs and Parker finds himself occupying the body of the Holy Pontiff.

Parker Backsteps to prevent three high school girls from accidentally blowing up a hotel, but it turns out to be a bit more involved then that.

When a reverend fighting against drug deals in Donovan's old neighborhood gets killed, Donovan's sister is killed as well. Donovan investigates and is arrested for killing one of the men responsible, and Frank engineers a Backstep to go back and save his friend.

Parker is ordered to Backstep in order to prevent a Presidential candidate from being assassinated. His mission is a success and the Governor asks him to join his campaign team, but Frank soon discovers the Governor has psychological issues and his daughter is trying to get the evidence to the public.

A scientist comes up with a cure for cancer, unaware it will unleash a deadly plague. The NSA of 168 years in the future send back an assassin to kill her before her ""cure"" wipes out the world.

Atmospheric interference causes Parker to return from a back-step with a woman who died fifteen years ago, and whose presence threatens to unravel the fabric of the universe.

Donovan puts his resignation from the team on hold in order to help Parker with a rescue operation to maintain peace in Bosnia.

Parker teams with an old friend, a Navy SEAL, to prevent the assassination of the new president of Columbia at a White House state dinner.

Mentnor's post-World War II experiments return to haunt him, as a virus that causes homicidal madness gets loose in an isolated New England village.

Olga and Parker get romantically involved when he backsteps to save her life after she encounters terrorists blowing up an oil line in the wilderness area she's vacationing in.

Parker ignores phone calls from someone claiming to be an old girlfriend, Deloris, until she carries out her threat to paralyze the nation's air traffic control system.