When she shows him her scars and he realizes what Hyde has done to her, Harry is ashamed and soothingly promises her that she will never see Hyde again.

Ivy recognizes Harry as the man who was once kind to her, but momentarily has an uneasy feeling about him.

When Harry returns home, Ivy is waiting in his patient's room because Marcia and her boyfriend had recommended him. That afternoon, Harry meets Bea at a museum and is overjoyed that Sir Charles now agrees to their imminent marriage. He then sends an anonymous gift of fifty pounds to Ivy and melts down the key to the street entrance of his laboratory, which 'Hyde' has been using. Soon Harry learns that Bea has just returned and determines never to take the serum again. Her friend Marcia is shocked when she accidentally sees welts on Ivy's back, and when Hyde suddenly comes to the flat, he behaves particularly cruelly toward Ivy. Meanwhile, Ivy, who has been set up in a flat by Hyde, lives in constant fear of him. Some time later, Bea is concerned that Harry has not written to her in weeks, but hides her worries from her father, who decides that she and Harry may marry, after all. Hyde later secretly asks the proprietor to fire Ivy and, despite her reluctance, insists on taking her home in a carriage, where he forces himself on her. When summoned to Hyde's table, Ivy does not recognize him as Harry, but becomes frightened and screams, causing a brawl to erupt among the customers. After taking another dose of the serum, Harry again turns into Hyde and goes to a music hall, where he sees barmaid Ivy Peterson, an attractive, sensual young woman whom he had rescued from an attacker some weeks before. Despite his loneliness during Bea's absence, Harry refrains from further experimentation until he gets a letter from Bea explaining that their trip is being extended because of Sir Charles' health. Hyde.' Just then, Sir Charles, accompanied by Bea, comes for a visit and announces that he will be taking Bea to the Continent to give Harry time to consider his position. After taking an antidote to turn himself back to normal, Harry tells his butler, Poole, that the strange voice he heard was a 'Mr. Harry then decides to take the serum himself and is briefly transformed, in both thought and countenance, into an evil alter ego. Hoping to try the serum out on Sam Higgins, a man who went mad after being in a gas works explosion, Harry rushes to the hospital but discovers that Higgins has just died. Harry throws himself into his work and has enough success experimenting with rabbits and guinea pigs to make him confident that the serum he has developed will work for humans. Harry is deeply in love with Beatrix Emery, the daughter of Sir Charles Emery, who likes Harry, but is concerned over his radical ideas and open display of affection for Bea.

In London, in 1887, prominent physician Henry Jekyll incurs the ire of his older colleagues because of his experiments and views on the possibility of separating the good and evil aspects of man's nature.

Jekyll feat of the monster within