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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.
S2, EP10 "Catch a Falling Star: May 21, 1979"
Sam assumes the existence of a stage understudy who must prevent a ruinous fall by the show's drunken lead (John Cullum).
S2, EP11 "A Portrait for Troian: February 7, 1971"
Sam becomes a parapsychologist charged with exorcising the spirit of a novelist whose voice torments his widow (Deborah Pratt).
S2, EP12 "Animal Frat: October 19, 1967"
Sam becomes a fraternity brother in 1967 who must stop a revolutionary from bombing a chemistry lab and killing innocent people.
S2, EP13 "Another Mother: September 30, 1981"
Sam becomes an '80s divorcee trying to keep her teenage son (Michael Stoyanov) out of peer-induced trouble.
S5, EP17 "Revenge of the Evil Leaper: Sept. 16, 1987"
Alia's arrival precipitates a "lover's leap" with Sam that lands them in a women's prison where Zoey attempts to kill them.
S5, EP16 "Return of the Evil Leaper: Oct. 8, 1956"
As a 1956 campus do-gooder, Sam draws the ire of a macho fraternity guy (Neil Patrick Harris), then encounters the evil leaper (Renée Coleman) again.
S5, EP15 "Blood Moon: March 10, 1975"
Sam leaps into what he believes to be a vampire, and must keep away from his new bride to prevent himself from biting her.
S5, EP14 "Dr. Ruth: April 25, 1985"
As Dr. Ruth Westheimer, Sam is host of a radio show; in the waiting room, Dr. Ruth (as herself) probes Al's womanizing ways.
