Time travel is a wonderful idea. Come explore that wonder while watching what Roger Ebert called "a more ambitious and touching movie than seems possible." Your evening begins at 6:30 with no host drinks in the lounge of San Francisco's luxurious Variety Preview Theater. Then, at 7:30, take limitless free popcorn to plush theater seating for a special screening of 2012's "Safety Not Guaranteed" (91% FRESH on Rotten Tomatoes). Roger Ebert wrote of this terrific little film: "Few descriptions of 'Safety Not Guaranteed' will do it justice. It's a more ambitious and touching movie than seems possible." Finally, at about 9 o'clock, physicist and sci-fi author Ken Wharton will help us examine the logic -- and illogic -- of time travel. Dr. Wharton is Professor of Physics and Astronomy at San Jose State University. He is also author of "Divine Intervention," earning the Special Citation for the Philip K. Dick Award in 2001. All proceeds benefit Variety Children's Charity of Northern California and Wonderfest, the Bay Area Beacon of Science.