Originally aired on NBC as a four-part, 6 1/2 hour mini-series. The program was repeated on NBC in April 1978 as a three-part, 6 hour mini-series. Starting in 1981, the mini-series was edited down again as a two-part, 4 hour program for syndication. The DVD version, which was released in 2014, is from the original four-part mini-series minus commercials.
