DC COMICS' VILLAIN DEATHSTROKE APPEARS ON THE ISLAND WITH OLIVER — After Detective Lance arrests Oliver for murder, Oliver tells Moira the only lawyer he'll allow to represent him is Laurel. Laurel takes the case which puts her at odds with her father. Oliver offers to take a polygraph in front Detective Lance but things get tense when Lance asks him if anyone else was on the island with him. Oliver flashes back to when he got his first scar, courtesy of Deathstroke (guest star Jeffrey Robinson). Colin Donnell, David Ramsey and Willa Holland also star. Michael Shultz directed the episode written by Wendy Mericle & Ben Sokolowski.

SAM, DEAN, CASTIEL AND MEG TEAM UP AGAINST CROWLEY AND HIS DEMONS — Castiel reappears in Sam and Dean’s life and tells them Crowley (guest star Mark Sheppard) has unleashed several demons into a small town. The demons are looking for Lucifer’s Crypt, which holds a valuable asset, but Castiel lies to Sam and Dean about what it is. While interrogating a demon, the three discover Crowley has been torturing Meg (guest star Rachel Miner), who knows the exact location of the crypt. Sam and Meg fight to hold Crowley off while Dean and Castiel go in search of the crypt. Thomas J. Wright directed the episode written by Robbie Thompson.

THE HUNTER'S MARK — Stefan and Klaus form an uneasy alliance to try and contain the danger that Connor (guest star Todd Williams) has unleashed on the town. When Connor takes Jeremy, Matt and April (guest star Grace Phipps) hostage at the Grill, Stefan and Damon have a serious disagreement about the best course of action, and Elena is again caught between the two brothers. The situation quickly turns violent when Klaus sends one of his hybrids, Dean (guest star Blake Hood, “The Young and the Restless”) to stand up to Connor. Caroline is surprised to find Hayley (guest star Phoebe Tonkin) at the Lockwood mansion. Meanwhile, Professor Shane (guest star David Alpay) works with Bonnie to help her get past her fear and guilt. Chris Grismer directed the episode written by Michael Narducci.

A KISS IS JUST A KISS -- Vincent (Jay Ryan) is captured on a convenience store surveillance video while preventing a robbery, and Cat (Kristin Kreuk) warns him to be extra careful when his photo appears in the newspaper. Cat and Tess (Nina Lisandrello) investigate the disappearance of a woman named Amy (guest star Annie Murphy), who has gone missing after her fiancée, Dr. Michael Walters (guest star Jeremy Glazer), surprised his bride-to-be by placing their engagement announcement in the paper that morning. Evan (Max Brown) runs Amy’s fingerprints and discovers her true identity, while Cat wonders if her disappearance was intentional after Vincent mentions that he and JT (Austin Basis) have an escape plan to clear out of their loft without a trace in a matter of minutes. Later, Michael also goes missing and Joe (Brian White) learns that his team has been deceived. Meanwhile, Heather (Nicole Gale Anderson) is planning a surprise birthday party for her sister, forcing Cat to postpone her birthday plans with Vincent. At the party, Cat and Evan share a surprising moment. Steve Adelson directed the episode written by Blair Singer and Kelly Souders.

AMANDA PUTS HER FINAL PLAN INTO MOTION Amanda forces Nikita into a life-threatening situation where she has to choose between saving Michael or saving herself. The team races to find a way to stop Amanda, but with a diminished Division, they might finally be out-gunned. Eagle Egilsson directed the episode written by Albert Kim (#322).

SAM AND DEAN RUN ACROSS A NEW AND UNUSUAL TEAM OF HUNTERS — Sam and Dean investigate some recent vampire kills and are surprised to learn Krissy Chambers (guest star Madison McLaughlin) is involved. They find Krissy and learn her father was killed and she’s been taken in by a man named Victor (guest star Adrian Hough), who has taken in a group of orphan kids to teach them how to hunt. Victor is helping the teenagers find the vampires who took their parents so they can get revenge. Sam is intrigued by Victor’s method of giving the teenagers a home life as well as a hunting life, but Dean is suspicious of Victor’s motives. John F. Showalter directed the episode written by Adam Glass.

Aubrey O'Day is the musical guest - In this fun, high-stakes, high-octane musical chairs competition featuring new obstacles and bridges, water rounds, mechanical rounds and slick zones, 12 thrill-seeking daredevils who will race head-to-head through five physically demanding, chair-splitting obstacle course-style eliminations as they each compete to claim a chair – all to the sounds of a live band. At the end of the hour, only one contestant will be left sitting triumphant to seize the cash prize and the title of OH SIT! champion. The show is hosted by Jamie Kennedy and actress/television host Jessi Cruickshank. Adding to the fun, Tanika Ray will be in the trenches with the contestants both on and off the track, and will add color commentary from the sidelines as the action unfolds. Aubrey O'Day is the musical guest.

UNCOMFORTABLE SITUATIONS — When Carrie (AnnaSophia Robb) is invited to a Halloween party in the city by Larissa (Freema Agyman), she decides to invite Walt (Brenden Dooling) to go with her to keep her company. It doesn’t take long before the night goes awry and Carrie is forced to babysit Larissa, who has clearly taken too many drugs. Walt finds himself in an uncomfortable position after a party guest gets a little too close for comfort. Elsewhere, Maggie (Katie Findlay) convinces Mouse (Ellen Wong) to go with her to Sebastian’s (Austin Butler) Halloween party at the diner to help keep tabs on him. After Doritt’s (Stefania Owen) attempt to sneak out of the house is thwarted, she discovers hanging out with her father (Matt Letscher) isn’t so bad. Jennifer Getzinger directed the episode written by Henry Alonso Myers.

GOING ONCE GOING TWICE — Wade (Wilson Bethel) struggles with feeling like he’s a placeholder in Zoe’s (Rachel Bilson) life, so he decides that they should go on a date. Despite Zoe’s apprehensions, she decides to bid on Wade’s basket at the upcoming charity picnic auction, but is surprised that she is not the only one interested. Lemon (Jaime King) mistakenly wins Lavon’s (Cress Williams) basket and decides to keep her true feelings for him to herself and instead offers some advice about his relationship with Ruby (guest star Golden Brooks). Meanwhile, George (Scott Porter) is interested in dating Tansy (guest star Mircea Monroe) and creates a basket that he hopes she will bid on. Tim Matheson also stars. Laura Bell Bundy guest stars. Norman Buckley directed the episode written by Jamie Gorenberg.

RIDING HORSES BAREBACK ON THE BEACHES OF JAMAICA — The girls are challenged to shoot a trial television commercial for the Jamaica Tourist Board, including writing their own script and starring in their own television spot while horse-back-riding in the ocean. The winner gets to come back to Jamaica to shoot an official television spot that will be broadcast worldwide. Then the models change bikinis for the “Dream Come True” perfume photo shoot where they pose for the chance to appear in the official fragrance ad.