A violent storm hits Briarcliff, allowing a group of patients to plan a daring escape. Sister Jude is haunted by her past.

Oliver still hasn’t figured out how to get back in Laurel’s good graces, but a late night bonding session with Thea gives him the inspiration he needs. Looking into a suspicious murder case, Oliver realizes an innocent man, Peter Declan, was framed by one of the targets on his list. As Arrow, he asks Laurel to help prove Declan’s innocence. Meanwhile, Walter asks one of his employees, Felicity Smoak, to look into a $2.6 million withdrawal that Moira made without his knowledge.

Chief Boden is accused of leaving a homeless man to die in a warehouse fire after ordering his men to evacuate the scene, creating negative press and bad feeling within the department. Meanwhile, Lieutenant Severide helps an elderly woman facing some neighborhood problems. Detective Voight ramps up his intimidation tactics aimed at Casey in an attempt to discourage him from testifying against his son. Shay is forced to revisit her heartbreak over her ex-girlfriend Clarice, when she finds herself face-to-face with the ex and her husband during a call. Hermann’s temper flares during a rescue call at a Halloween block party.

When four men go missing in rural Oregon, the BAU searches for a common link among them in order to track them down. Also, JJ gets upset when her son Henry doesn't want to celebrate Halloween this year.

When a K-9 is blamed for the death of his partner, the CSI team discovers there's more to the case. Meanwhile, Finlay and Morgan investigate the death of a high-profile divorce lawyer with a lot of enemies.

Viewers choose the Season 3 winner, who will be announced during the finale in Los Angeles. Also: The eliminated artists reunite.

Jordan and Keegan celebrate Halloween by fleeing racist zombies; the stars of "Human Centipede" have a frightening reunion; a struggling public wizard school.

Talk show host and ABC Special Correspondent Katie Couric; New Halloween Costumes; Musical guest by Rita Ora

The investigation into a girl's disappearance leads to a high-tech kidnapper who uses the Internet to cover his tracks; Rollins reconnects with her sister.

Jay and Gloria host a yard sale to help with a school fundraiser; Mitch and Cam vet Alex’s new friend; Manny finds a trunk full of secrets.

Rayna and Teddy's relationship is tested when Rayna performs with Deacon at Teddy's campaign fundraiser and a woman from Teddy's past (Kimberly Williams-Paisley) shows up with a secret. Meanwhile, Juliette tries to burnish her image with an appearance on "Good Morning America" and is interviewed by Robin Roberts; Gunnar makes a connection with his publisher's assistant, Hailey; and Teddy and Coleman agree to take the moral high ground during the campaign -- but will it last?

When a new gang hit Chatsworth, The Maguires fear for their future on the estate, and it falls on Jamie to protect his family from their new enemies. however, one of the Maguires closest friends is giving the gang inside infomation. But who? Meanwhile, Frank and Dom clash over the number of conquests they've made on the estate.

Rocked by the recent news of drug use by a beloved icon, the world is left feeling lost and betrayed. The boys, join with the rest of the nation, and remove their yellow wristbands. Everyone is on board, except for Stan, who just can’t seem to cut off his bracelet.

After Benny gets brutally beat up by some vampires, he calls Dean for help. Dean abruptly packs up and tells a confused Sam that he’s taking a "personal day." Benny confesses that he’s going after his Maker so Dean offers to help, flashing back on the many times Benny helped him and Castiel in Purgatory. Meanwhile, Sam uses his solo time to reflect on the life he left behind with Amelia. However, when things go bad for Dean and Benny, Dean calls Sam for help, which makes everything very complicated.

Hurricane Sandy wreaks havoc on New Jersey, Mitt Romney hosts a relief rally, Donald Trump cuts Obama some slack, and Lilly Ledbetter explores gender pay discrimination.

From "Parks and Recreation", actress Rashida Jones; from "The Walking Dead", actor and director David Morrissey.