In 1897, Judith Collins is released from the sanitarium and returns to Collinwood, where Gregory Trask, hoping to seize control of the Collins family wealth, plans her murder. Evan Hanley conducts a ceremony to reunite Quentin Collins' mind with his body, which has been taken over by Count Petofi. Secretly cured of his vampirism, Barnabas Collins reappears, claiming to be a British relative. Mesmerized by Josette's portrait, lady Kitty Hampshire begins to believe she is Barnabas' lost love. When Kitty vanishes, Barnabas follows her back to the year 1796. He is chosen against his will to become the human leader of the Leviathans, an ancient race from another world. The ghost of Jenny Collins warns Chris Jennings in 1969 that Quentin is the only one who can save him from the werewolf curse.
In 1897, Julia hears voices from the present. Angelique is puzzled by Quentin’s behavior.
In Petofi’s body, Quentin orders Kitty to steal Quentin’s portrait. Quentin’s wedding is set.
Angelique decides her marriage must be postponed. In a seance, Charity calls upon a spirit to appear.
Judith returns to Collinwood from the sanitarium. Dressed as Josette, Kitty visits Jeremiah Collins' grave.
Quentin convinces Evan that his mind is in Petofi’s body. They pretend to hold a ceremony.
Petofi forces Evan to dig a grave. Gregory Trask learns that Judith is back and making new plans.
Angelique visits a mysterious cave. Charity tells Angelique that Quentin is not who he appears to be.
Quentin, whose mind remains in Petofi’s body, explains the mind switch to Angelique.
Kitty writes a letter, dating it 1796. She is entranced by the portrait of Josette at the Old House.
A desperate Angelique tries to convince Aristede to save her.
Barnabas reappears at Collinwood, claiming to be a relative from England.
Barnabas’ coffin is set afire. Trask later confronts Barnabas with a cross.
Kitty accepts Edward's marriage proposal, but later goes to Barnabas.
Petofi, in Quentin's body, watches Charles Delaware Tate use the I Ching wands in a ceremony.
Petofi enters the I Ching trance and moves through the door to the Collinwood of the present.
Petofi demands that Barnabas return the portrait of Quentin. Kitty realizes she is Josette.
Kitty is terrified of what will happen if she becomes Josette. Beth discovers the mind switch.
Using Petofi's power, Quentin attempts to reverse the mind switch.
Quentin, whom Aristede believes is Petofi, orders Aristede to stab Petofi, whom Aristede believes is Quentin.
Petofi recalls Aristede being pursued by Garth Blackwood, a sadistic prison master from England.
Trask asks Evan’s help in influencing Judith. Blackwood’s spirit seeks revenge on Aristede.
Judith orders Tim Shaw to brick up Trask inside Quentin’s room.
Trask calls Judith on Quentin’s telephone and begs for mercy. Blackwood locates Aristede.
Quentin is determined to leave Collinwood and tries to stay awake to keep Petofi from again possessing him.
Barnabas asks Angelique to help Quentin. Charity attempts to steal Petofi’s glasses.
Blackwood sets fire to the cottage where Petofi has entered a trance. Charity sees a vision.
Kitty goes to Josette’s room at the Old House, wearing Josette’s wedding dress.
Barnabas follows Kitty. In the year 1796, Angelique taunts Josette on the cliff at Widows’ Hill.
In 1796, Josette believes Barnabas has betrayed her. The Leviathans capture Barnabas.
The Leviathans greet Barnabas as their master and give him a mysterious box.
In 1969, Julia and Carolyn meet Megan and Philip Todd, who owns the antique shop.
Professor Stokes tries to restore Sabrina’s memory. Julia is mystified by Barnabas’ strange behavior.
In a dream, Oberon, the Leviathan, tells Barnabas how to recognize the chosen ones.
Barnabas gives Megan the Leviathan box. A sound indicates something may have escaped from it.
A mysterious stranger introduces himself to Carolyn as her father, Paul Stoddard.
The Leviathan child has come to stay with Philip and Megan.
Barnabas claims that Philip will be punished for allowing the Leviathan book to be stolen.
David Collins is mesmerized by the Leviathan sign of the Naga. Olivia Corey searches for the Tate painting.
The ghost of Jenny Collins warns Chris Jennings that he must find Quentin.
A seance is held to contact Quentin. Paul panics when he sees the Naga mark on his wrist.