quantum leap aired from March 26, 1989, to May 5, 1993 but set in the then future of 1999 even thoug

quantum leap aired from March 26, 1989, to May 5, 1993 but set in the then future of 1999 even though Sam Beckett time travels to the past all the clothes Al wears are from the “future” (and the evil leapers which we see once or twice.)