In a surprise appearance at Comic-Con, the director of The Dark Knight trilogy and Inception says that his latest film is his grandest in scope. One of the films executive producers is the theoretical physicist Kip Thorne, who gave Nolan extensive guidance on wormholes could work — a hint at how the films characters will accomplish their interstellar travel. Nolan was joined on stage by the films star, Matthew McConaughey, who reiterated what was previously disclosed about the plot: that it involves his character, an astronaut named Cooper, and his efforts to find another planet for humanity to live on after earth becomes inhabitable. A new trailer shown to the Comic-Con crowd showed McConaughey and co-star Anne Hathaway, who plays a fellow astronaut, as they hunt for an inhabitable planet.