Complex sentence: Saward and series producer John Nathan-Turner liked Clegg's ideas, and they commissioned the script in September 1981, with the first episode being delivered in October and the three following episodes arriving in January 1982.
Split into simpler sentences: Saward and series producer John Nathan-Turner liked Clegg's ideas, and they commissioned the script in September 1981. The first episode was delivered by Clegg in October and the three following episodes arriving in January 1982.