The Ultimate Vampire Resource and Directory

Quantum Leap is an American science fiction television series which ran for 96 episodes from March 1989 to May 1993 on the NBC network. The series was created by Donald P. Bellisario, based on a concept originally created for Galactica 1980. This concept was then reworked outside of the Battlestar Galactica framework.

The plot involves quantum physicist Sam Beckett (Scott Bakula) leaping into a variety of different people in various points in history within the time span of his own lifetime. His only link with his own time is the cigar smoking, womanizing Al (Dean Stockwell), who appears to Sam as a hologram that most people other than Sam cannot see or hear.

The show overlaps a number of genres, including science fiction, family drama, comedy, social commentary and nostalgia, thereby acquiring a broad range of fans.

At the end of each episode, Sam leaps into another person, giving viewers a teaser of the following episode's leap. As part of a running gag, after Sam's leap, in awe or dismay about his new situation, he often utters the catch phrase "Oh boy!".

LINK to Wikipedia article