Complex sentence: An anthology series, each episode had a self-contained story usually in a thriller or horror style, and often with a twist ending, involving such subjects as the occult, science fiction, murder schemes, and whodunits.
Split into simpler sentences: An anthology series, each episode had a self-contained story usually in a thriller or horror style, and often with a twist ending. Subjects explored included the occult, science fiction, murder schemes, and whodunits.