When eight researchers at Tsalal Station vanish without a trace, Danvers orders a search. After handling a workplace dispute, Navarro tries to convince a skeptical Danvers that the men's disappearance is connected to the murder of a local activist.

Some time later, Whitney is heavily pregnant and has stopped taking money from her parents, while her and Asher's marriage has improved.

Sonic must learn to give up some control if he's going to defeat Nine on the battlefield. The first step? Letting the team take over.

Spade arrives in Bozouls. A brief trip becomes a new chapter as he falls for a local vineyard owner. Years later, Spade remains, a widower and retiree quietly living out his golden years in peace. But the return of his adversary changes everything.

Ted's plan to spend Halloween with John is thwarted when Blaire forces him to be her designated driver for the night. Susan tries to cheer John up by finding him a new friend.

After a passionate courtship, Lord Frederick Trenchard marries the young and striking Clara Dunn. However, the intrigue and scandals of Belgravia, as well as secrets from Frederick's past, threaten the couple's newfound happiness.

Olga uncovers Staszek's secret. Then, Forst makes a mental connection that brings him one step closer to the killer - and one step closer to danger.

Caitlyn continues investigating Lyle's disappearance. Accompanied by police, the school's guidance counselor checks on the boys.

It's the first heat and four everyday Aussies will battle our Gladiators in nail-biting knockout events like Duel, Powerball, The Wall, Pyramid and The Eliminator, for a spot in the quarter finals.

Victoria Coren Mitchell hosts the quiz where knowledge only gets you so far - logic and lateral thinking are the vital extra ingredients.

The team work a suspected suicide but the investigation raises more questions than it answers. Gabriel has an exciting new opportunity, both professionally and personally, and enlists Jack's help. When a disgruntled professor of criminology is passed over for promotion, events take a truly sinister turn and the interview panel begin to be targeted. Could a member of the Lyell be next?