Warner Bros. and Legendary Pictures have dated “Gravity,” Alfonso Cuaron’s 3D space station thriller, for an Oct. 4 domestic release.“Gravity,” starring Sandra Bullock and George Clooney, had originally been set for release this past Nov. 12 but the studio decided last May to delay the movie until this year. The Oct. 4 date positions “Gravity” as a possible awards season contender. It will open against a quartet of titles — Relativity’s thriller “Paranoia,” The Weinstein Co.’s “Sin City: A Dame to Kill For,” Fox’s 3D version of “Star Wars Episode III: Revenge of the Sith” and Disney’s Vince Vaughn comedy “The Delivery Man.” Warner-based David Heyman is producing “Gravity” through his Heyday Films. Pic revolves around two astronauts fighting to survive on a remote space station after satellite debris wipes out the rest of the crew and destroys most of the station. Scripted by Cuaron and his son, Jonas, the film was originally set up at Universal but moved to Warner Bros.