Complex sentence: A fourth, previously unbroadcast episode, "Too Much Too Late", was aired for the first time in 1990, on the USA Network it has since been run by other networks in syndication with the fifth-season episodes.
Split into simpler sentences: A fourth, previously unbroadcast episode, "Too Much Too Late", was aired for the first time in 1990, on the USA Network. It has since been run by other networks in syndication with the fifth-season episodes.