T2-3D: Battle Across Time simultaneously at 30 frames per second. Several elements of "T2 3-D: Battle Across Time" have been patented by Universal, including the seat drop effect, the blending of live action and film, the trio of projection screens, and the simulated assault weapons. The film was shot at the abandoned Eagle Mountain iron ore mine, just north of Desert Center in California. The cast and crew from the first two Terminator films returned for the shoot, including Arnold Schwarzenegger as The Terminator, Linda Hamilton as Sarah Connor, Robert Patrick as T-1000, and Edward Furlong as John Connor. To achieve the 3-D effect
John Connor attacked by a T-X Terminator (Kristanna Loken), which was sent from the future. Unlike its predecessors, the T-X's objective was to terminate his future officers as secondary targets because John's location was unknown. When it encounters John it changes its priority to focus entirely on him and Kate. A protector T-850 (Schwarzenegger), who is a doppelgänger of John's previous protector, is also sent back in time to protect him, explaining that Judgment Day had only been delayed to July 25, 2004, which happens to be only hours away. The T-850 also states that it was not sent from the future