Dr. Jekyll and Mr. Hyde is a four-act play written by John McKinney in collaboration with the actor Daniel E. Bandmann. It is an adaptation of Strange Case of Dr Jekyll and Mr Hyde, an 1886 novella written by the Scottish author Robert Louis Stevenson. The story focuses on Henry Jekyll, a respected London doctor, and his involvement with Edward Hyde, a loathsome criminal. After Hyde murders a vicar, Jekyll's friends suspect he is helping the killer, but the truth is that Jekyll and Hyde are the same person. Jekyll has developed a potion that allows him to transform himself into Hyde and back again. When he runs out of the potion, he is trapped in his Hyde form and commits suicide before he can be arrested.
The play debuted on Broadway in March 1888. The adaptation was not authorized by Stevenson, but copyright law in the United States allowed Bandmann to produce the adaptation without permission. In August, Bandmann took the play to London, where it was in direct competition with an authorized adaptation, also using the title Dr. Jekyll and Mr. Hyde, written by Thomas Russell Sullivan and starring Richard Mansfield. Both plays opened in London in August 1888, but Bandmann's production was quickly closed due to legal action by Stevenson's publisher.
Plot
In the first act, attorney J. G. Utterson is at a London vicarage, talking to the vicar, Reverend William Howell. Howell relates a story about how he intervened when he saw a boy being beaten by a man named Edward Hyde. Utterson is dismayed to hear the name Edward Hyde. After the vicar leaves, Utterson speaks with Dr. Lanyon, then with Dr. Henry Jekyll, who lives next door to the vicarage. After Jekyll and Utterson leave, Lanyon speaks to the vicar's daughter, Sybil Howell, who admits to being in love with Jekyll. Sybil sees that Lanyon does not approve, and she asks Jekyll about it when he returns. He says she would not understand, and begins talking about the dual presence of good and evil in men. Suddenly, Jekyll feels that a "change is approaching", and runs into the shadows. Edward Hyde emerges from the shadows and menaces Sybil. She calls for her father, who enters and is immediately attacked and murdered by Hyde. Hyde runs away; Jekyll returns and asks who has attacked them. With his dying breath, the vicar says it was Hyde.
In the second act, Inspector Newcomen shows Utterson part of the walking stick that Hyde used to club Howell. Utterson recognizes it as one he gave to Jekyll. Newcomen vows to find the killer, and asks to interview Sybil, who has been staying with Utterson since the murder. Jekyll visits Utterson with a letter from Hyde, claiming he has departed. When Jekyll leaves, Utterson's assistant, Mr. Guest, points out that the handwriting on the letter is very similar to Jekyll's. When Utterson leaves, Jekyll returns and delivers a monologue confessing that he is the murderer. After a brief conversation with Sybil, Jekyll leaves, and Utterson's niece Lilian brings in a group of choirboys from Howell's church, who sing a song for Sybil. Then Utterson and Newcomen return, saying they play to lay a trap for Hyde. Sybil insists on going with them. When Hyde approaches the vicarage, he is chased by the police.
In the third act, Utterson and the police discuss their failure to catch Hyde. Officer O'Brien says he thought Hyde came into the vicarage, but he saw Jekyll approaching him instead. Utterson tells the police that Jekyll has been allowing Hyde into his laboratory. Sybil overhears this and is distraught to learn that Jekyll has helped her father's killer. Sybil resolves to investigate the case herself by visiting Hyde's landlady, Mrs. Viley. Lilian goes with her. In return for money, Viley tells them that she has never met Jekyll, but has heard Hyde threaten repeatedly to kill him. Hyde returns home and attacks Viley when he learns she has received money from Sybil. Viley screams for the police and Hyde flees. In the act's final scene, Lanyon waits in his office with drugs from Jekyll's laboratory that he retrieved on written instructions from Jekyll. Hyde arrives to retrieve the drugs. In front of Lanyon, Hyde mixes the drugs and drinks the resulting potion, which transforms him into Jekyll.