Michael S. Stuhlbarg (born July 5, 1968) is an American actor. He is best known for playing organized crime boss Arnold Rothstein in the HBO television series Boardwalk Empire (2010–2013), troubled university professor Larry Gopnik in the 2009 dark comedy film A Serious Man, Griffin in Men in Black 3 (2012), Dr. Flicker in Blue Jasmine (2013), and computer scientist and inventor Andy Hertzfeld in the biopic Steve Jobs (2015).