Opposing sides gather for a meeting. Cersei and Jaime have a disagreement. Arya and Sansa remember their father and the Army of the Dead arrives at Eastwatch.
Mary Cushing enlists Sherlock Holmes in investigating the disappearance of her sister, Susan. With her marriage to Jim no more, Mary finds love in Alec Fairburn, but with tragic consequences. Both Alec and Mary are murdered, their ears removed and bodies disposed of in a lake. With a friend of Mary's being framed for the killings, only Holmes knows who the real murderer is!
Jeremy's mother comes to visit for a family funeral. Her new boyfriend is a military man who Jeremy deeply resents, and who Mark idolizes. Desperate to impress, Mark endures an extraordinary ordeal.
The Doctor has an appointment with the Immortal, while Peri finds herself caught up with Glitz and the Tribe of the Free. Meanwhile, Merdeen begins to question all he believes.
With the black light converter destroyed, the Doctor fears for the planet's safety and needs to find the Secrets of the Sleepers and discover why they are there.