If you are referring to Doc or his actor Christopher Lloyd, neither died.
Dr. "Doc" Emmett Lathrop Brown was played by Christopher Lloyd.
Christopher Lloyd
Back to the Future was science fiction comedy adventure film that was produced by Steven Spielberg and released in 1985. The main character of Marty McFly was played by Michael J Fox while Christopher Lloyd played Doc Brown.
Emmett "Doc" Brown was a main character played by Christopher Lloyd in the "Back to the Future" movies.
Principal Strickland in "Back to the Future" was played by actor James Tolkan. He is known for his authoritative presence and memorable one-liners in the film. Tolkan reprised his role in both sequels, further solidifying his character's place in the franchise.
He was the actor who played the scientist in the Back to the Future movies.
Dr. "Doc" Emmett Lathrop Brown was played by Christopher Lloyd.
Christopher Lloyd
Back to the Future was science fiction comedy adventure film that was produced by Steven Spielberg and released in 1985. The main character of Marty McFly was played by Michael J Fox while Christopher Lloyd played Doc Brown.
Doctor Emmett Brown or Doc. Played by Christopher Lloyd.
Emmett "Doc" Brown was a main character played by Christopher Lloyd in the "Back to the Future" movies.
Eric Stoltz
Principal Strickland in "Back to the Future" was played by actor James Tolkan. He is known for his authoritative presence and memorable one-liners in the film. Tolkan reprised his role in both sequels, further solidifying his character's place in the franchise.
Michael J. Fox
Doc Brown
Edison
Emmett Brown