S1, E3: Flora has escaped the clutches of Billy Oates and throws herself on Marlott's mercy. Believing her to be a key witness to Alice's disappearance, he brings her to his lodgings for safety. Nightingale continues to pursue various suspects with mixed success, much to Marlott's frustration, who feels that they are slipping away between his fingers. One person of interest who introduced herself to Marlott at Blake's house is the writer Mary Shelley. Marlott has been reading her novel Frankenstein and travels to Kentish Town to investigate how she devised her horrifying tale. He finds it hard to believe the connection between her monster and the child corpse is a mere coincidence. Shelley is guarded and defensive - is there something in her past, which she is concealing? Marlott visits Lady Hervey, whose brother runs a charitable clinic, and asks for them to take Flora in to protect her. Hervey invites Marlott to go to church with her but he is disturbed by the experience - he tells Lady Hervey that his faith has been shaken since the death of his wife and baby daughter and he feels God is lost to him. Pritty enters his bank in a rush - he wants to withdraw all his money. But Nightingale is watching him and in a fierce chase, he apprehends Pritty and takes him to Bow Street for further questioning. Marlott meets Daniel Hervey at the clinic, which is also a hospice for the poor. He agrees to take Flora. But he also identifies a sore on Marlott's hand as a reappearance of syphilis. Hervey offers to treat him with a new medicine he has invented, but Marlott declines, preferring the established mercury treatment. Marlott is surprised at home by a visit from Sir William Chester, enquiring about Marlott's investigation. Is he also a person of interest?