Web Reference: The Leap Back was the season premiere of Quantum Leap 's fourth season, also the 54th overall episode in the series. Written by series creator Donald P. Bellisario, the episode, which was directed by Michael Zinberg, originally aired on NBC-TV on September 18, 1991. The Leap Back - June 15, 1945: Directed by Michael Zinberg. With Scott Bakula, Dean Stockwell, Mimi Kuzyk, Amanda Wyss. Sam and Al have switched places. Now Sam is the hologram, and Al is the leaper. Al must reunite a returning WWII veteran with the woman he left due to the war. This full-length episode is available for purchase. A lightning bolt strikes Sam (Scott Bakula) and Al (Dean Stockwell), causing them to trade places and personalities: Al (Dean Stockwell) becomes...
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