Barnabas’ secret is threatened by David Collins’ curiosity. Anxious to become human again, Barnabas orders Dr. Julia Hoffman to accelerate her treatments to cure him, but the experiment backfires, causing Barnabas to age rapidly and assume the appearance of a 200-year-old man. During a seance at Collinwood to contact the spirit of Barnabas’ young sister Sarah, Victoria Winters mysteriously disappears and finds that she has travelled back in time to the year 1795.
Sarah gives David a toy soldier as protection and warns him there is danger at the Old House.
David returns to the Old House, where he finds an open coffin, followed by an angry Barnabas.
David convinces Burke and Dr. Woodard to go to the Old House, where they search for the coffin.
Desperate to be believed, David informs Burke and Dr. Woodard of the secret room in the Collins Mausoleum.
After a psychiatrist tries to explain David’s fears, Dr. Woodard returns to the mausoleum for further investigation.
The ghost of Sarah appears to an astonished Dr. Woodard inside the mausoleum.
After researching the Collins’ family history, Dr. Woodard decides to have a confrontation with Barnabas.
Dr. Woodard overhears Julia tell Barnabas of the location of the notebook which has records of her experiments.
When Barnabas and Julia go to Collinwood to destroy her notebook, they discover that it is missing from her room.
Barnabas tells a horrified Julia of his plans for Dr. Woodard and she reluctantly agrees to assist him.
Dr. Woodard defiantly informs Julia that he would rather die than become a loathsome thing such as Barnabas.
Sam and Burke suspect that Dr. Woodard was murdered although the coroner rules otherwise.
Julia spies on Barnabas as he tries to become closer to Victoria and cause a wedge between her and Burke.
Sarah warns David that a disaster will happen soon. David is distraught over Burke’s trip to Brazil.
Elizabeth receives word that Burke’s plane has crashed, but Victoria refuses to believe Burke is dead.
Barnabas warns Julia not to let her jealousy interfere with his treatments, which hewants accelerated.
Barnabas is jubilant over the results of his treatments. Julia hypnotizes Victoria and shows her Barnabas’ coffin.
Julia reluctantly proceeds with a massive treatment for Barnabas, but she becomes terrified at the result.
An aged and withered Barnabas must seek a victim, but he cannot bring himself to attack Victoria.
Carolyn secretly goes to the Old House to investigate and makes a startling discovery.
Under Barnabas’ control, Carolyn is ordered to help him win over Victoria’s affections and to discredit David.
A jealous Julia again hypnotizes Victoria and warns her that Barnabas intends to turn her into Josette.
Barnabas threatens to kill Julia unless she refrains from interfering with his plans for Victoria.
Julia shows Victoria, under hypnosis, the coffin Barnabas plans for her. Carolyn tells Barnabas of Julia’s betrayal.
Barnabas instructs Carolyn to steal Julia’s notebook. Julia realizes that Barnabas plans to kill her.
Julia hides her notebook in the Collinwood foyer clock. Barnabas orders Carolyn to keep watch on Julia.
Julia takes her notebook into town and leaves it with Tony Peterson, a lawyer who dislikes the Collins family.
Barnabas decides on supernatural tactics intended to drive Julia insane.
A traumatized Julia hears the voice of Dr. Woodard. Barnabas deceives Julia into believing he now has a conscience.
Sarah appears to Julia at the Collins Mausoleum but she will not promise to help Julia.
Alone at Collinwood, a horrified Julia receives a telephone call telling her she will die soon.
Carolyn steals Tony’s keys and breaks into his office to open the safe containing Julia’s notebook.
Tony doesn’t know whether he should believe Carolyn or Julia. Barnabas attempts to strangle Julia.
Sarah informs David that the dead will shortly destroy someone living at Collinwood.
A seance is held at Collinwood to contact the spirit of Sarah. During a blackout, Victoria disappears.
Victoria finds herself outside the Old House, which looks new. She learns that she has traveled back in time to the year 1795.
In 1795, Barnabas’ father Joshua Collins agrees to hire Victoria as the governess for Sarah.
The ship carrying Barnabas’ fiancee, Josette DuPres, from Martinique is late, but Josette’s servant Angelique arrives.
Josette’s love for Barnabas makes Angelique jealous. Angelique practices witchcraft that causes Barnabas to choke.
A doctor can find nothing physically wrong with Barnabas. Angelique becomes fearful that he may die.