Complex sentence: The original Todd theme, from 1993 to 1996, encompassed Todd's rape of Marty and his early misdeeds; the second theme was repeatedly heard in 1998 and 2000; and the third theme was first heard in 2001.
Split into simpler sentences: The original Todd theme, from 1993 to 1996, encompassed Todd's rape of Marty and his early misdeeds. The second theme was heard throughout 1998 and 2000, and the third theme was first heard in 2001.