Complex sentence: In 2006, McDowell portrayed radio mogul Jonas Slaughter on', In 2007, he portrayed the wealthy, conspiratorial villain Mr. Linderman during the first season of the NBC hit series "Heroes", a role he reprised in the third season premiere.
Split into simpler sentences: In 2006, McDowell portrayed radio mogul Jonas Slaughter on'. The following year he portrayed the villainous Mr. Linderman on the first season of the NBC series "Heroes", a role he reprised in the third season premiere.