In Porgy and Bess, David Alan Grier plays the drug dealer Sporting Life, a role closely associated with Sammy Davis Jr. and Cab Calloway. Courtesy of the American Repertory Theater hide caption

itoggle caption Courtesy of the American Repertory Theater

Victor LaValle is also the author of Slapboxing with Jesus, The Ecstatic and Big Machine. E. Robateu/Random House hide caption

itoggle caption E. Robateu/Random House

Republican presidential candidate Mitt Romney at a campaign rally in Powell, Ohio, on Saturday. AP Photo/Evan Vucci hide caption

itoggle caption AP Photo/Evan Vucci

Dr. David Eagleman is a neuroscientist and writer. He directs the Laboratory of Perception and Action at Baylor College of Medicine. Sharon Steinmann/Department of Neurobiology and Anatomy at the University of Texas, Houston Medical School hide caption

itoggle caption Sharon Steinmann/Department of Neurobiology and Anatomy at the University of Texas, Houston Medical School

Paul Auster is the author of fiction including The New York Trilogy and In the Country of Last Things. Lotte Hansen/Picador hide caption

itoggle caption Lotte Hansen/Picador

President Obama is on record as opposing superPACs for normalizing gigantic donations, but his campaign has hesitantly decided to accept donations from such groups. He is shown above speaking during a campaign stop in Oskaloosa, Iowa, last week. Scott Olson/Getty Images hide caption

itoggle caption Scott Olson/Getty Images

Mario Savio, shown here at a victory rally in UC Berkeley's Sproul Plaza on Dec. 9, 1964, was the face of the free speech movement. AP hide caption

itoggle caption AP

Scenes in the movie Sleepwalk With Me -- about Mike Birbiglia's sleep disorder — made him emotional while filming them. Adam Beckman/IFC Films hide caption

itoggle caption Adam Beckman/IFC Films

Sacha Baron Cohen plays Admiral General Aladeen, the authoritarian, anti-Semitic and unexpectedly sympathetic protagonist of The Dictator. Melinda Sue Gordon/Paramount Pictures hide caption

itoggle caption Melinda Sue Gordon/Paramount Pictures