They were Libyans.
Doc brown stole the plutonium from the nuclear power plant. *edit* The above answer is INCORRECT. The plutonium was stolen from Libyan terrorists who gave it to him to make a bomb.
Lybian terrorists stole plutonium and asked Doc to make them a bomb. He gave them a fake bomb made up of pinball machine parts and used the plutonium for his new invention.
The name of Doc Brown's dog in 1955 is Copernicus.
He gets shot by the Lybian terrorists after they found him because he had given them a fake bomb instead of one made of plutonium like they had asked. But after Marty McFly's accidental trip to 1955- history is changed so that Doc finds out from a letter that had been written to him 30 years earlier and he has on a bullet proof vest that night.
Ask the Doc they will
Dr. "Doc" Emmett Lathrop Brown was played by Christopher Lloyd.
Doc Brown doesn't die in "Back to the Future" because Marty McFly travels back in time to save him. In the original timeline, Doc is shot by terrorists, but when Marty goes back to 1955, he warns Doc about the danger, allowing him to avoid the fatal encounter. This alteration of events showcases the film's theme of how small changes in the past can significantly impact the future.
88 mph The question was "where", not how fast it needed to go to travel. And, the answer to the question is he got the plutonium from a group of Lybian (not sure how it's spelled) terrorists who wanted him to build them a bomb, but instead used it to power the DeLorean. At the end, however, he used garbage to power it...it's much safer this way.
Doc Emmett Brown
dr.who
doc brown
Emmett Brown