Doc after removing the prosthetic from his face.
- "Sorry for the disguise Marty, but I was afraid you wouldn't recognize me. I went to the Rejuvenation Clinic and got an all natural overhaul!"
- —Doc
A rejuvenation clinic was a clinic where a number of years could be added to one's life, up to 30 or even 40 years. Dr. Emmett Brown underwent the process during his visit to 2015. Treatments included hair repair, changing the blood, and replacing the spleen and colon. However, Doc thought he looked so youthful that he then added prosthetic makeup before returning to 1985 so that Marty McFly would be able to recognize him.
Behind the scenes
In reality, Doc tearing off his makeup was simply because the filmmakers did not want to go through the process of making Christopher Lloyd look older anymore. Plus, they didn't want Doc to be old when entering a relationship with Clara Clayton in the third film.
Appearances
- Back to the Future Part II (mentioned only)
- Back to the Future Part II novelization (mentioned only)