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Former scientist Sam Beckett finds himself trapped in time due to an experiment gone awry, leaping into the body of a different person each week. Al Calavicci, at first known only as The Observer, is Sam's holographic adviser -- he provides Sam with some details about his new identity and gives him guidance on how to help the people affected by his presence. But with little memory to help guide him, our hero is forced to bluff his way through many a wacky situation.
S3, EP20 "Heart of a Champion: July 23, 1955"
Sam becomes a wrestler who must prevent his brother from going down for the count permanently when their title match poses a threat to the man's life.
S3, EP21 "Nuclear Family: October 26, 1962"
Sam becomes a college student working in the family bomb shelter business on the eve of the Cuban missile crisis.
S3, EP22 "Shock Theater: October 3, 1954"
In a mental institution, Sam undergoes electroshock therapy which results in his having multiple personalities -- from past leaps -- and Al loses contact.
S4, EP1 "The Leap Back: June 15, 1945"
A lightning bolt strikes Sam and Al, causing them to trade places and personalities: Al becomes a World War II ex-POW just returned home in 1945; Sam leaps "home" to the Q.L. control center in 1999.
S5, EP22 "Mirror Image: August 8, 1953"
Sam leaps into himself in the middle of a tavern in a coal-mining town filled with familiar faces; Sam gets an opportunity to change Al's life.
S5, EP21 "Memphis Melody: July 3, 1954"
As a young Elvis, Sam risks his career by helping another aspiring singer (Mary Elizabeth McGlynn) escape her abusive fiancé.
S5, EP20 "The Leap Between the States: Sept. 20, 1862"
As his own great-grandfather, Union soldier Sam must charm his Southern belle great-grandmother (Kate McNeil).
S5, EP19 "The Beast Within: Nov. 6, 1972"
Sam becomes a rugged bear-like man who inhabits a mountainside forest with a buddy (guest star Sean Gregory Sullivan) who is a troubled and disabled Vietnam veteran.
