
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.

As an inept FBI agent in 1973, Sam must protect a witness (Teri Austin) targeted for death by her drug-dealing ex-boss.

Sam becomes a parapsychologist charged with exorcising the spirit of a novelist whose voice torments his widow (Deborah Pratt).

Sam becomes a mortician in 1958 who is strangely obsessed with investigating the suicide of a teenage German girl.

Sam is brought back to Halloween 1964 as a horror novelist who has his own share of scary experiences, including an encounter with the devil.