山姆（山缪的暱称）意外的旅程起源于他的时间旅行实验被某个神秘、无法辨识的高能量体所吸收，这个能量体利用他（原因不明）来避免一些普通人生命中所遭遇到的悲剧发生。山姆也遭受不规则的失忆症所苦，又称为「蜂窝乳酪」（Swiss-cheesing）或是（影集中较为技术性的名词）「磁粉探伤」（magnafluxing），这让他无法记得他自己生命中大部分的细节。他与他自己时空唯一的连结，是他朋友艾尔（Al）的全像投影（通常只有山姆看得见）。艾尔（由迪恩·史多克威尔（Dean Stockwell）饰演）是一位美国海军上将，也是这个时间旅行计画的原创人和主管。
播出日期: 1990-09-28
运行时间: 45 min
概述: November 25, 1969: As himself at the age of 16, Sam has the opportunity to both win the high school basketball championship and save his family from their sad fates.
播出日期: 1990-10-05
运行时间: 44 min
概述: April 7, 1970: As a Navy SEAL in his own brother's squad, Sam must determine whether he is there to save Tom's life or ensure the success of the mission on which his brother was killed. Also Al from 1970 was a P.O.W.
播出日期: 1990-10-12
运行时间: 43 min
概述: August 19, 1963: Sam finds himself in one holy mess as a priest in Philadelphia, trying to help an alcoholic priest deal with a killer and the death of a young parishioner.
播出日期: 1990-10-19
运行时间: 45 min
概述: June 15, 1965: Sam is a photographer who must protect a fashion model from a growing dependency on amphetamines and a predatory manager's ambitions.
播出日期: 1990-10-26
运行时间: 45 min
概述: October 31, 1964: Things do more than go bump in the night when Sam leaps into Joshua Raye, a horror novelist on Halloween. Although Ziggy claims he's there to prevent the death of a church deacon, things get even stranger when two more people die without warning.
播出日期: 1990-11-02
概述: June 7, 1958: As Darlene Monte, a contestant in the "Miss Deep South" beauty pageant, Sam must come to the aid of an innocent contender who faces disgrace when she poses for naughty pictures taken by a sleazy pageant photographer. As if things weren't bad enough, Sam must ensure that Darlene finishes third, so that she'll go on to become a doctor.
播出日期: 1990-11-09
概述: August 11, 1965: Sam leaps into a black med. student engaged to a white woman in order to ensure that he and his fiancée survive the Watts Riot together.
播出日期: 1990-11-16
概述: May 9, 1974: Leaping into magician Harry Spontini, Sam has to prevent his estranged wife from taking their daughter away from him as she files for divorce, so she can marry her sleazy divorce attorney.
播出日期: 1990-11-30
概述: September 1, 1958: As "Bones," a member of a motorcycle gang, Sam is an uneasy rider who has to prevent a Jack Kerouac-inspired young woman from meeting her death on the road.
播出日期: 1990-12-21
运行时间: 60 min
概述: December 24, 1962: On Christmas Eve, Sam leap into Reginald Pierson, valet to a wealthy contractor, who is in danger of losing his soul in an attempt to demolish a Salvation Army mission, so he can build his "Blake's Plaza." Seeing a similarity to the Dickens's character, Sam and Al decide to "Scrooge" the greed out of the man.
播出日期: 1991-01-04
运行时间: 60 min
概述: July 4, 1964: On a cross-country car trip, Sam, as 13-year-old Butchie, must contend with a sadistic older sister and a mother on the verge of running away from an unfulfilling marriage, in search of the feminine mystique.
播出日期: 1991-03-06
概述: November 15, 1955: Billie Jean Crockett is a pregnant teenager who will make the second biggest mistake of her life - giving her baby up for adoption - unless Sam, as Billie Jean, can convince someone to help her raise her child... before he goes into labor himself
播出日期: 1991-03-13
运行时间: 60 min
概述: October 6, 1957: Sam leaps Kenny Sharp, better known as "Future Boy," sidekick to Moe Stein, host of the kid's show, "Time Patrol," who also happens to be building a time machine in his basement. Unless Sam can prevent Moe's daughter from attempting to have her father committed, Moe is destined to be killed as he tries to hop a freight train.
播出日期: 1991-03-20
运行时间: 60 min
概述: October 6, 1979: An aspiring dancer working as a waitress in a strip club is in danger of being led into a life of prostitution unless Sam, as "Rod the Bod," can convince her to audition for a spot in a professional dance group. But, since she's deaf, the choreographer doesn't believe she has the time to give the young lady the attention she'll need.
播出日期: 1991-03-27
概述: November 10, 1985: Joey Dinardo is a lounge lizard on the run from mob hitmen. When Sam leaps in, his ex-girlfriend, and former musical partner have found him, and now both are on a run for their lives from a killer who seems to know their every move.
播出日期: 1991-04-03
概述: August 4, 1961: It's the best little cathouse in New Orleans. No, it's the Gilbert Labonte Sewin' & Quiltin' Academy. As the proprietor of this worthy establishment, Sam must prevent the mysterious death of a resident who doesn't belong there.
播出日期: 1991-04-10
运行时间: 60 min
概述: April 12, 1974: Sam is a glitter rock star in danger of being stabbed to death after a performance, unless Sam can determine who, from a growing list of people, the real killer is.
播出日期: 1991-04-17
运行时间: 60 min
概述: June 18, 1976: It's the leap from hell as Sam, a bounty hunter handcuffed to a wily embezzler who will stop at nothing to get away from him, has to deal with his captive, as well as his attraction towards her, despite her countless attacks on him.
播出日期: 1991-05-01
概述: May 12, 1971: "Just think of someplace far away" is the advice Sam hears as he leaps into Jesus Ortega, a Cuban-American being strapped into an electric chair. A last second stay of execution gives Sam just forty-eight hours to either prove himself innocent or fulfill his mission so that he can leap before the Big Switch is pulled
播出日期: 1991-05-08
概述: July 23, 1955: The heart of a champion belongs to Ronnie, a professional wrestler, who will die if he competes in the title match. Sam, as his brother and new partner Terry, must convince him of his hidden health problem, while avoiding his own health problem - the jealous wrestler-husband of a woman who has taken an amorous interest in Sam.
播出日期: 1991-05-15
概述: October 26, 1962: Sam finds himself the brother of a fallout shelter salesman during the Cuban Missile Crisis, where he must defuse a potentially explosive situation as panic sets in on the night of John F. Kennedy's speech to the nation.
播出日期: 1991-05-22
概述: October 3, 1954: Leaping into Sam Bederman, a mental patient who is suffering from acute depression, Sam receives an overloaded electroshock treatment, which causes his Swiss-cheesed memory to be replaced by personas from previous leaps. Al, finding himself visible to the mentally absent, must try to complete Sam's mission, and convince him to take another shock treatment, in order to leap Sam out before contact is lost forever.
