Penny Dreadful Season 1 Episode 6 “What Death Can Join Together” opens with Vanessa and Sir Malcolm speaking about Fenton’s death and his master. Malcolm later expresses his displeasure with Vanessa as he feels she is not doing everything in her power to find Mina.
Meanwhile, Ethan returns from his night with Dorian to find Brona in bed, coughing violently. She apologizes to him for running out on him at the theater. Ethan is forgiving an tells her that he loves her with all of his heart.
Back at the mansion, Vanessa has a tarot reading so that she can learn more about Mina’s whereabouts. After drawing cards, she hears Mina’s voices along with the sounds of screams and a boat. She reports back to Sir Malcolm about sounds, telling him that something terrible seems to have happened aboard a ship. At this point, Dorian enters the scene where he asks if Vanessa would like to join him for an adventure.
With Vanessa gone, Malcolm and Sembene speak about what must be done if Mina can not be saved. They also concur that Fenton was able to communicate with the master, much like a bat would.
At the theater, Caliban is lingering around downstairs until the lead actress and his crush enter. She asks for him to fix a prop blood tube for her. As he fixes it, she shows kindness to him and talks with him about his books. In addition to that, she explains that her brother had an accident that left him scarred. Much like Caliban, he to is shy.
Later, Caliban leaves a book of poems for the actress in her room. As he watches her open it from the shadows, her boyfriend enters the scene. Her mate asks if the book is from his competition to which she replies no, and kisses him. Caliban sees this and cries.
After performing an autopsy on Fenton, Victor meets with Van Helsing about the results. Van Helsing explains to Victor that what they are searching for is a vampire. He explains that he has had much experience with the kind, as he once had to kill his own wife by a stake through the heart and decapitation. As he further explains the traits of vampires, Van Helsing warns the doctor that he should not let himself get consumed by his work.
At this point, Van Helsing and Victor are walking to the street. Van Helsing tells Victor he sees him as a son and think he’s is destined for something great. However, their conversation is cut short as Caliban pulls Van Helsing into an alley and snaps his neck. He tells Victor he will continue to kill those around him until he creates his bride.
Ethan joins Malcolm and Sembene as they search for clues in a “plagued” ship. On board, they discover the bodies of many woman who look like Mina, but are not. Suddenly, the master vampire awakes and awakes the rest of the vampiric women as well. They attack the three but are all put down by the men. Malcolm then sees the master vampire and his captured Minabehind a wall of flames. As he tries to save her, the master and Mina vanish.
After having her picture taken Dorians, Vanessa goes on a date that night with Mr. Gray. Their night ends back at his place, where they have an intense and violent sex session. However, the sex seems to have unleashed something within Vanessa as she hears a demonic voice and leaves. After she leaves, Dorian visits his portrait and his scratch wounds heal instantly.
Back at Malcolm’s, Ethan and Malcolm are having a drink. Ethan tells Malcolm that there are things that are beyond his control, and he is concerned that Sir Malcolm didn’t bring Vanessa with them to look for Mina. He tells Malcolm that he should trust Vanessa, or they’re going to lose a lot of battles. When Vanessa returns from Dorians, Malcolm says he has a lot to tell her. Vanessa looks terrible. Suddenly her feet lift off the ground and she starts levitating.