Strange Case of Dr Jekyll and Mr Hyde is the original title of a novella written by the Scottish author Robert Louis Stevenson first published in 1886. The work is commonly known today as The Strange Case of Dr. Jekyll and Mr. Hyde, Dr. Jekyll and Mr. Hyde, or simply Jekyll & Hyde. It is about a London lawyer named Gabriel John Utterson who investigates strange occurrences between his old friend, Dr. Henry Jekyll, and the evil Edward Hyde. The novella's impact is such that it has become a part of the language, with the very phrase "Jekyll and Hyde" coming to mean a person who is vastly different in moral character from one situation to the next.
There have been many audio recordings of the novella, with some of the more famous readers including Tom Baker, Roger Rees, Christopher Lee, Anthony Quayle, Martin Jarvis, Tim Pigott-Smith, John Hurt, Ian Holm and Gene Lockhart.
Stevenson had long been intrigued by the idea of how personalities can affect a human and how to incorporate the interplay of good and evil into a story. While still a teenager, he developed a script for a play about Deacon Brodie, which he later reworked with the help of W. E. Henley and was produced for the first time in 1882. In early 1884 he wrote the short story "Markheim", which he revised in 1884 for publication in a Christmas annual. One night in late September or early October 1885, possibly while he was still revising "Markheim," Stevenson had a dream, and upon wakening had the intuition for two or three scenes that would appear in the story. Biographer Graham Balfour quoted Stevenson's wife Fanny Stevenson:
Dr. Henry Jekyll and his alternative personality, Mr Edward Hyde, is a fictional character in Robert Louis Stevenson's 1886 novella Strange Case of Dr Jekyll and Mr Hyde.
Dr. Henry Jekyll is a "large, well-made, smooth-faced man of fifty with something of a slyish cast", who occasionally feels he is battling between the good and evil within himself, thus leading to the struggle between his dual personalities of Jekyll and Edward Hyde. He has spent a great part of his life trying to repress evil urges that were not fitting for a man of his stature. He creates a serum, or potion, in an attempt to mask this hidden evil within his personality. However, in doing so, Jekyll transforms into Mr. Hyde, a hideous, evil creature without compassion or remorse. Jekyll has many friends and has a friendly personality, but as Hyde, he becomes mysterious and violent. As time goes by, Hyde grows in power. After taking the potion repetitively, he no longer relies upon it to unleash his inner demon i.e., his alter ego. Eventually, Hyde grows to be stronger than Jekyll.
Mister Hyde (Calvin Zabo) is a fictional character, a supervillain appearing in American comic books published by Marvel Comics.
Mister Hyde first appeared in Journey into Mystery #99 and was created by Stan Lee and Don Heck. Mister Hyde based upon the literary character by Robert Louis Stevenson.
He has appeared as a regular character in Thunderbolts since issue #157, and remained with the team after the title transitioned into Dark Avengers beginning with issue #175.