The discovery of a strange murder weapon leads the CSIs into the world of gigolos.
Hank pushes Gomez to pursue one last lead, while Walt struggles to protect the family. Jesse gets alarming news and rushes to meet with Mr. White.
When superintendent Chalmers is fired for taking Bart and his friends on an unauthorized field trip, the boys hold the school hostage until he is reinstated.
Gabrielle teaches Carlos how to dance on a strip pole; Susan seeks out a punishment for feeling guilty; Renee bonds with one of the customers at a senior center; Tom and Lynette wonder why Parker was at a late night party; Bree discovers Chuck's past.
After missing and presumed dead for eight years, Marine Sergeant Nicholas Brody is rescued in Iraq, and returns home to his family. But CIA agent Carrie Mathison suspects he might have been turned by his terrorist captors, and believes he could be part of a plan to attack America.
MI5 receives a red flash: radioactive material has been detected at an airport. They have intelligence that a highly dangerous anarchist with a penchant for dirty bombs has secretly entered the country. They enlist Dimitri to honeytrap the anarchist's only known contact, his sister Natalie. It is a morally tough operation for Dimitri, but through Natalie he gets close to the dirty-bomber. Dimitri's personal connection to them both proves invaluable in the tense and potentially lethal endgame.
Despite being publicly embarrassed by legal trouble, Nucky's biggest concern may be holding on to his private army in a battle for control of Atlantic City. Meanwhile, Jimmy pitches a business deal to Arnold Rothstein in New York, but may have more in common with Meyer Lansky and Lucky Luciano. Margaret draws on past experience to retrieve some valuable information, Chalky clashes with a fellow inmate, and an Irish nationalist comes to town looking for support.
While the Griffins are housebound during a hurricane, Brian ingests psychedelic mushrooms. He sees bizarre and unsettling things, and acts accordingly. Meanwhile, the rest of the family is bored and irritable, and Meg finally lashes out at Chris, Lois and Peter for all the crap they've given her. The crossover starts on The Cleveland Show S03E02 The Hurricane (I). It continues on American Dad! S08E02 Hurricane! (III).
Bo and Dyson team up to track down a stolen Mongolian Death Worm on behalf of Dyson's old wolf pack mate. When things get complicated, Dyson finds himself reliving his medieval days – tormented by the hard choices he once had to make, and fighting in the present not to repeat past mistakes.
Five teams (three members each) compete by making Halloween displays inspired by a witch and by a scary haunted house.
Dexter shows up at his 20th high-school reunion with the intention of confronting the former prom king. Elsewhere, an investigation into a heinous murder with religious overtones leads Dexter to ponder spiritual matters and wonder about his son's legacy. And an unexpected situation results in Debra becoming a hero.
Were we better off as cavemen? Morgan Spurlock ("Super Size Me") joins nine ordinary men and women in an attempt to survive in the wild using only stone-age technology. Cold, dehydration, and hunger threaten to derail the experiment from the start.
Morgan Spurlock ("Super Size Me") and his group continue their experiment to live in the wild only stone-age technology. Hunger and deprivation push the group to the brink of failure. Can a successful elk hunt save them?
After Downton is turned into a convalescent home for wounded officers, Matthew brings a general to visit, but Branson has a surprise in store. And is Lavinia hiding something?
When Tim reveals to the family that Shane is his son it throws everybody for a loop and threatens to ruin the traditional Bartlett-Fleming-Morris naming ceremony for Lou's baby girl.
Vienna Austria: Zhalia leads the team into Klaus's library to find the Amulet of Void. Both the Organization and the Foundation are ambushed by a devastating new enemy, The Blood Spiral -- lead by their old foe Rassimov. Dante manages to save himself by bonding with powerbonded Caliban but the Spirals are too strong, and Void ends up in their hands.
Prague, The Czech Republic: The Huntk teams faces off against Lucas Casterwill, Sophie's brother. They come to an understanding and help find the missing Amulet of Void. Zhalia's plan lets them trick The Organization into revealing it's location in Klaus's library. Lucas explains the history of the betrayer who tried to summon the Nullifiers in the past.
Evil sorceress Morgana summons mighty gatekeeper the Cailleach, who opens a door to another world from which hellish creatures pour forth. As Arthur and his loyal knights take up arms, Merlin discovers the only thing that will stop them is an unimaginable sacrifice.