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Season 1 - Mar. 26, 1989
Season 2 - Sep. 20, 1989
Season 3 - Sep. 28, 1990
Season 4 - Sep. 18, 1991
Season 5 - Sep. 22, 1992

Quantum Leap Season 4 Episode 9
HD
Overview:
September 7, 1953: A devastating drought will be the ruin of a small town unless Sam, as Billy Beaumont, “purveyor of precipitation and maker of rain,” can find a way to make it rain, while keeping his family together in the process.