Octavia Spencer Boards Bong Joon-Ho February 3, 2012 Indie sci-fi thriller lands Oscar frontrunner. Heat Vision reports that ‘The Help’ star Octavia Spencer has signed up for Bong Joon-Ho’s sci-fi thriller ‘Snow Piercer,’ joining a cast of Chris Evans, Kang Ho Song, John Hurt, Tilda Swinton and Jamie Bell. The indie sci-fi is set in “a future where, after a failed experiment to stop global warming, an Ice Age kills off all life on the planet except for the inhabitants of the Snow Piercer, a train that travels around the globe and is powered by a sacred perpetual-motion engine. A class system evolves on the train but a revolution brews.” Spencer is on a high at the moment after scoring a Broadcast Film Critics Award, a Golden Globe and a SAG Award. The actress is the current frontrunner for the Best Supporting Actress award at this year’s Oscars.