While creating his time machine, Doc Brown had kept two DeLorean DMC-12 vehicles in his secret lab. One was modified with a flux capacitor, time circuits, and a nuclear reactor, while the other was not. Marty, Doc and Jennifer then met at the Lone Pine Mall parking lot. Marty checked the chronometer of the steam time car, and determined that it had arrived from 2035. He donned the radiation suit that was in the DeLorean, and Doc donned the diving suit that was in the steam time car.