Strange Case of Dr Jekyll and Mr Hyde is a story by Robert Louis Stevenson, originally published in 1886. Dr. Jekyll developed a potion that turned him into an evil man named Mr. Hyde. It was inspired by the idea that even a good man has an evil side that must be suppressed. In the original novella, the fact that the two men were one and the same was a twist only revealed later. However, the story is so well known that filmmakers rarely include that element of mystery. Instead, the tale gives them a chance to show off their use of special effects in the transformation. Over 100 films have been made of the Jekyll/Hyde story. Here are a few transformation scenes from some of them, in more or less chronological order.
Dr. Jekyll and Mr. Hyde 1912
A 1912 production.
Dr. Jekyll and Mr. Hyde 1920
Starring John Barrymore.
Dr. Jekyll and Mr. Hyde 1931
Fredric March won an Academy Award for his performance as Jekyll and Hyde.
Dr. Jekyll and Mr. Hyde 1941
The best known movie version, at least to TV audiences, starred Spencer Tracy and Ingrid Bergman.
Abbott and Costello Meet Dr. Jekyll and Mr. Hyde 1953
Boris Karloff in the title role.
Dr Jekyll & Sister Hyde 1971
Dr Jekyll & Sister Hyde is a 1971 Hammer film in which the doctor changes into a woman -makeup and all.
Jekyll and Hyde... Together Again 1982
In the comedy Jekyll and Hyde... Together Again, the mad scientist's transformation is based on snorting a drug which turns him into a hip, sexy, party animal. How '80s!
Dr. Jekyll and Ms. Hyde 1995
Dr. Jekyll and Ms. Hyde is a comedy in which Richard Jacks, a descendant of Dr. Jekyll, finds his great-grandfather's formula and messes it up. He turns not into a monster, but into a woman. He shouldn't have added the estrogen. This video is a compilation of transformations from the movie.
Jekyll (NSFW language) 2007
Jekyll was a 2007 BBC TV series starring James Nesbitt as Tom Jackman, a modern Jekyll and Hyde. He doesn't transform physically, but the personality transformation is quite horrifying. Beware that BBC language standards are quite different from those in American television.
Dr. Jekyll and Mr. Hyde 2008
In the 2008 film, the transformation has no special effects at all, but relies on the actor's skills. And some music.
Bonus: Daffy Duck
Daffy goes to see Dr. Jekyll about curing a case of hiccups. The 1942 cartoon is called The Impatient Patient.