Once Upon a Time, 8-9 on ABC: In “The Thing You Love Most,” evil Queen Regina (Lana Parrilla) does everything in her power to force Emma (Jennifer Morrison) out of Storybrooke and out of her and Henry's (Jared Gilmore) lives forever. True Blood’s Kristin Bauer guest-stars as Maleficent.
The Good Wife, 9-10 on CBS: While Alicia (Julianna Margulies) wades through diplomatic loopholes to defend a Taiwanese national, Eli’s (Alan Cumming) ex-wife (guest star Parker Posey) asks him to vet her for a possible political campaign in “Affairs of State.”
Dexter, 9-10 PM on Showtime: As Homicide uncovers evidence that a recent spate of killings are religiously motivated, Dexter (Michael C. Hall) questions matters of faith in “A Horse of a Different Color.”
Pan Am, 10-11 PM on ABC: In the “The Genuine Article,” Maggie (Christina Ricci) manages to maneuver her way onto the flight down to Rio de Janeiro, despite being perilously close to losing her job for insubordination. Kate (Kelli Garner) has earned her stripes as a courier, but when she’s given a difficult mission involving Niko (guest star Goran Visnjic), a Yugoslavian diplomat, she's not sure how to manage the task. Ginny (Erin Cummings) and Dean (Mike Vogel) continue to play with fire in Rio.
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Nikita, 8-9 PM on The CW: While searching for information on the black box in “343 Walnut Lane,” Birkoff (Aaron Stanford) comes across Nikita’s (Maggie Q) birth certificate. Nikita and Michael (Shane West) track down Nikita’s father Richard (guest star David Keith), but the reunion is not quite what Nikita expected. Meanwhile, Percy (Xander Berekley) tells Alex (Lyndsy Fonseca) that Nikita’s black box contains information that could help Alex avenge her father’s death. [SNEAK PEEK PHOTOS]
Dancing With the Stars, 8-10 PM on ABC: Don’t miss the sixth week of Season 13 performances. Ron Artest, Elisabetta Canalis, Kristin Cavallari, Chynna Phillips, and Carson Kressley have already gotten the boot; who will screw up tonight?
Castle, 10-11 PM on ABC: In the aptly titled “Demons,” Castle (Nathan Fillion) and Beckett (Stana Katic) investigate the murder of a popular ghost hunter who was killed while digging into paranormal activity at a famous mansion. [WATCH THE PREVIEW]
Gossip Girl, 8-9 PM on The CW: While Yom Kippur with family and friends, Blair (Leighton Meester) and Louis (guest star Hugo Becker) find themselves in a power struggle with Louis’s family. Serena’s boss (guest star Michael Michele) puts Serena (Blake Lively) in the awkward position of choosing between her new job and her relationship with Dan (Penn Badgley), and a last-minute surprise forces Diana (guest star Liz Hurley) to delay her launch of the New York Spectator. In true Diana form, she expects Nate (Chace Crawford) to do whatever it takes to save the day in Season 5’s “The Fasting and the Furious.”[WATCH THE PREVIEW]
Hart of Dixie, 9-10 PM on The CW: After discovering something shocking about the local minister (guest star Peter MacKenzie) and his wife (guest star Kerry O’Malley), Zoe (Rachel Bilson) finds herself at the center of a town scandal in the all-new “Faith and Infidelity.” Lemon (Jaime King) submits a proposal to Lavon (Cress Williams) for a renovation of the town’s historic bridge that was destroyed by Hurricane Katrina.
Bored to Death, 9-9:30 on HBO: Already nervous about his appearance on “The New Dick Cavett Show,” Jonathan (Jason Schwartzman) is thrown for a loop when he finds out that his nemesis, Louis Greene (John Hodgman), is also scheduled to appear. Meanwhile, Ray’s (Zach Galifianakis) attentiveness as a father is tested, and George (Ted Danson) is floored by a bit of unexpected news.
Hawaii Five-0, 10-11 PM on CBS: An investigation into the murder of a wealthy restaurant owner leads McGarrett (Alex O'Loughlin) to take part in a charity MMA fight to the finish. Meanwhile, NCIS Agent Kensi Blye (guest star Daniela Ruah) lends her expertise to McGarrett and Lt. Commander White when they ask her to examine a video of McGarrett’s father in the all-new “Ka Hakaka Maika'i.”[WATCH THE PREVIEW]
The Vampire Diaries, 8-9 PM on The CW: In the all-new, super creepy Season 3 episode “Ghost World,” spirits invade Mystic Falls as the town prepares to celebrate Illumination Night. After a particularly violent encounter with an angry ghost, Damon (Ian Somerhalder) asks Bonnie (Kat Graham) to figure out why the spirits are so powerful. Elena (Nina Dobrev) convinces Jeremy (Steven R. McQueen) to use his connection to the other side to help her find a new way to reach Stefan (Paul Wesley), leading Jeremy to a terrible choice. [WATCH THE PREVIEW]
Parks and Recreation, 8:30-9 PM on NBC: April (Aubrey Plaza) and Andy (Chris Pratt) host a Halloween bash at their place, Tom (Aziz Ansari) emcees an event for Leslie’s (Amy Poehler) campaign, and Ron (Nick Offerman) and Ann (Rashida Jones) give April and Andy an unusual wedding gift in “Meet ’N’ Greet.”
The Secret Circle, 9-10 PM on The CW: Cassie (Britt Robertson) throws an epic Halloween party that takes a dangerous turn in “Masked.” Intent on wooing Jake (guest star Chris Zylka) back, Faye (Phoebe Tonkin) — who was the brains behind the party — goes all out on her Halloween costume. After a fight with Diana (Shelley Hennig), Adam (Thomas Dekker) turns to Cassie for advice. And some dangerous, uninvited guests set their sights on the Circle. [WATCH THE PREVIEW]
Grey’s Anatomy, 9-10 PM on ABC: Owen (Kevin McKidd) tries to teach the doctors a lesson in teamwork when he signs them up for a baseball league in “Put Me in, Coach.” Meanwhile, Lexie (Chyler Leigh) can’t hide her jealousy when she sees Mark (Eric Dane) with another woman, and Alex (Justin Chambers) fights to keep baby Zola from being transferred to another hospital because of a conflict of interest involving Derek (Patrick Dempsey) and Meredith (Ellen Pompeo). [SNEAK PEEK PHOTOS]
NCIS, 8-9 PM on CBS: When a Navy lieutenant dies of forced overhydration in “Thirst,” the team is on the case to find his twisted killer. Meanwhile, Gibbs (Mark Harmon) meets Ducky's (David McCallum) new love interest, Mary (guest star Cheryl Ladd). [WATCH THE PREVIEW]
The X Factor, 8-10 PM on FOX: The remaining acts perform in front of the judges and a live audience.
Dancing With the Stars, 8-10 PM on ABC: Catch highlights from Monday’s round of performances, and then tune in for the live results show. Someone’s gotta go!
America’s Next Top Model, 9-10 PM on The CW: In the seventh episode of the All-Star Cycle, the models create a signature fragrance and launch it at a public event while posing in a bathtub. The girls then pose as reality stars for the photo shoot, where Kathy Griffin is a guest judge.
Modern Family, 9-9:30 on ABC: It may be an oldie, but it’s a goody! In this rerun of Season 2’s “Halloween,” Claire (Julie Bowen) spookifies the Dunphy house for the trick-or-treaters. She attempts to bring the entire family into her creepy shenanigans, but none of it goes quite right. Cameron (Eric Stonestreet) hates Halloween because of a traumatic childhood experience; Mitchell (Jesse Tyler Ferguson) has had a bad day at work; and Gloria (Sofia Vergara) is upset because Jay (Ed O’Neill) and Manny (Rico Rodriguez) have been making fun of her accent. [WATCH A CLIP]
Happy Endings, 9:30-10 on ABC: The Halloween fun continues with the all-new Season 2 episode “Spooky Endings.” Jane (Eliza Coupe) and Brad (Damon Wayans Jr.) spend a creepy evening house-sitting for suburban friends... while the rest of the gang parties it up at a Halloween bash.
Revenge, 10-11 PM on ABC: The Grayson 4th of July parties are legendary, but this year's festivities ignite the wrong kind of fireworks when an incriminating surveillance video pops up and breaks the bond of trust between the Graysons and their head of security, Frank. Frank won't go down without a fight, which spells trouble for Nolan (Gabriel Mann) and Emily (Emily VanCamp). Meanwhile, the tension between Emily and Tyler (guest star Ashton Holmes) comes to a head, Daniel (Josh Bowman) can't seem to catch a break, and both Porter boys (Nick Wechsler and Connor Paolo) make bold moves to get their girl on “Intrigue.”[WATCH THE PREVIEW]
American Horror Story, 10-11 PM on FX: In part one of “Halloween,” the line between the living and the dead blurs at the mansion when two previous residents give Vivien (Connie Britton) and Ben (Dylan McDermott) decorating advice.