Plot summary
Vanessa's evening with Dorian allows a demon to possess her. Sir Malcolm engages the help of Ethan, Victor and Sembene to restrain her, but her condition worsens as time passes. Sir Malcolm, having hoped that Vanessa could contact Mina while under the influence of the possession, finally allows a Catholic priest into the house to administer last rites, but when Vanessa attacks the priest as he begins, Ethan manages to perform an exorcism on Vanessa by himself. Vanessa collapses, but emerges from her room later. She informs Sir Malcolm that she now knows where Mina is.
Credits
Adapted from Wikipedia contributors, List of Penny Dreadful episodes. HTML formatting and reference markers removed.