A diver is trapped in an underwater intake pipe.

Sarah comes home looking for answers, and with the help of Cosima, they begin digging into the origins of the clone experiment. The hunt for answers takes her right into the belly of the beast, but getting out could cost her more than she knows.

Leonardo and Riario have to deal with a near death experiance, while Zoroaster and Nico come up with a plan to escape. Bayezid travels to Rome on a diplomatic mission.

Host Charlize Theron; The Black Keys performs.

The 21 contestants enter the kitchen to find a mystery box at their bench. They have one hour to cook a dish using at least one of the ingredients.

Jack is not happy with Carolyn for having kept secret that they have a daughter. Sarah and Anna start their trial periods in their new homes.

Raphael is worried about Casey's ability to handle big mutant threats especially when they meet Slash again and discover he has a partner of his own, the Newtralizer.

When the Circus of Crime rolls into town, Hawkeye's dark past begins to surface and puts the Avengers in danger.

The body of a man killed by a single gunshot wound is discovered on the moors and a burnt-out truck containing the remains of a deer is found a mile away. Joe is convinced the case is a poaching war gone wrong, but for Vera, the truth is never that straightforward. Delving into the victim's story, she unearths a sad childhood in the country and a troubled life in the city, scraping by as a novelist. Following the recent death of his grandfather, he returned to Northumberland after a 15-year absence to sell his inheritance to a wealthy couple - but pulled out of the deal at the last minute. Could his death be linked to a dispute over land?

Maxine imposes a undead travel ban across Roarton and new methods in which PDS sufferers have to pay back their debt to society. Kieran soon realises he's now trapped, when he works alongside Simon, the two have a instant connection. Amy continues to battle her health concerns. Jem grows closer to Gary after a prank at school goes wrong.