When typhus fever emerges in Tannochbrae, the Irish farm workers are blamed and anxiety rises.
An ex-colonial couple, just back from India, give Dr. Napier cause for concern.
Janet finds a day-old baby abandoned on the doorstep of Arden House.
Dr. Finlay's vacation turns out to be rather more passionate than he'd expected.
A wife believes she has contracted syphilis from her husband, but neither has been unfaithful.
A patient admits to murder on his death bed. Dr. Finlay is torn about revealing all to the police.
One by one the nuns at a convent start to suffer from a series of strange medical symptoms.
On the night before Hogmanay, Arden House is snowbound. Janet and the doctors face a long night.