William Sadler is presently filming another guest starring role on the FOX hit show “Fringe”. In 2008, he already appeared in the episode “The Equation” as Doctor Sumner in the first season of the series. On August 12, 2011 he tweeted a picture with John Noble and himself.
He recently worked on another “Hawaii Five-0″ episode. CBS announced that Season 2 will debut on Monday, September 19, 2011 at 10/9c pm.