Mr. Hyde is another persona of Dr. Jekyll. Dr. Jekyll, a scientist, wanted to create a formula that would absorb a person's evil. Once it was created, he experimented on himself. He made a mistake while making it and whenever Jekyll drinks it, he transforms into a horrible, monstrous man named Mr. Hyde. Mr. Hyde then goes on a rampage until the effects where off, turning back into Jekyll. 

Universal Monster RebootEdit

In the new Dark Universe franchise, Dr Jekyll is the leader of the monster hunter secret organization named "Prodigium". Before the brilliant Dr Henry Jekyll investigates the evil and good forces, and the tragic consequence for him is the mankind´s evil incarnation named "Edward Hyde" his other personality and alter-ego. He was portrayed by actor Russell Crowe in the 2017 film The Mummy.