Cartoons never have reunion episodes but here’s “Scooby-Doo, Where Are You Now!” (CW, 8 p.m.), a special that reunites the Fred, Daphne, Scooby and the rest, who receive the praises of real people from Weird Al Yankovic to Iain Armitage. Janel Parrish hosts.
Conductor and violinist Scott Yoo and his friends reconstruct Beethoven’s most personal music on “Great Performances: Now Hear This” (PBS, 9 p.m., check local listings).
“Eli Roth’s History of Horror” (AMC, 10 p.m.) looks at horror films that are connected with holidays — Halloween, sure, but also Christmas, Mother’s Day and April Fool’s Day.
The comedian and “Daily Show” correspondent has a new special, “Roy Wood Jr.: Imperfect Messenger” (Comedy Central, 10:30 p.m.), following another new episode of “Tha God’s Honest Truth with Charlamagne Tha God” (Comedy Central, 10 p.m.).
The mayor tracks down a zombie protestor on “Day of the Dead” (Syfy, 10 p.m.).
In the made-for-TV thriller “Deadly Due Date” (Lifetime Movie Network, 8 p.m.), a planned adoption from a reunion goes all wrong. Ashlyn Yennie, Ella Cannon and Brianna Butler star.
Jamie finds some corruption in the force on “Blue Bloods” (CBS, 10 p.m.).
“Shark Tank” (ABC, 8 p.m.) welcomes the founder of Nextdoor.
Sleepwalking becomes an epidemic on “Nancy Drew” (CW, 9 p.m.).
“The Problem with Jon Stewart” (Apple TV+, streaming) discusses economic inequities.
Ashleigh Murray, Luke James, Michelle Williams and Loretta Devine star in the still-too-early “Christmas in Harmony” (Hallmark, 8 p.m.), about a woman tricked into auditioning for the Holiday Chorus, directed by an ex-boyfriend.
True crime shows have their own Halloween tie-in, “Trick or Terror” (Investigation Discovery, 9 p.m.).
“Ready to Love” (OWN, 8 p.m.) shifts power to the men, who are encouraged to get out of their comfort zones.
David Beckham, Saweetie, James Corden and Bubba Wallace are among the guests on “The Shop: Uninterrupted” (HBO, 9 p.m.).
“Real Time with Bill Maher” (HBO, 10 p.m.) hosts Sen. Chris Coons, Caitlin Flanagan and Sean Spicer.
Turner Classic Movies kicks off a weekend-long Halloween festival with “The Abominable Dr. Phibes” (8 p.m.), “Night of the Living Dead” (10 p.m.), “Invasion of the Body Snatchers” (midnight), “Hell Night” (2 a.m.) and “Exorcist II: The Heretic” (3:45 a.m.). During the day are some leftover Lucille Ball films, “Without Love” (6 a.m.), “Easy Living” (8 a.m.), “Marines Fly High” (9:30 a.m.) and “Best Foot Forward” (10:45 a.m.). Then comes some films about small town justice with “Having Wonderful Time” (12:30 p.m.), “Lawless Valley” (1:45 p.m.), “The Boy from Oklahoma” (3 p.m.), “A Lion is in the Streets” (4:30 p.m.), and “Flamingo Road” (6 p.m.).
Game 3 of the World Series has Houston at Atlanta (Fox, 8 p.m.), with the series tied 1-1.
Hockey includes Florida at Detroit (Hulu, 7 p.m.).
NBA action includes Charlotte at Miami (ESPN, 7:30 p.m.) and Dallas at Denver (ESPN, 10 p.m.).
College football includes Navy at Tulsa (ESPN2, 7:30 p.m.) and UNLV at Nevada (CBS Sports, 10 p.m.).
Daytime Talk
The View: Ricki Lake, Kermit, Miss Piggy. The Talk: Paula Abdul, Kevin Frazier, Matt Iseman. Ellen DeGeneres: Kris Jenner, Kim Kardashian West, Shin Lim. Kelly Clarkson: Meghan Trainor, McKenna Grace, Ernie Hudson, Jennifer Houghton. Tamron Hall: Jack Osbourne, Dara Renee. Wendy Williams: Chrissy Teigen, Whitney Cummings. The Real: Gizelle Bryant.
Late Talk
Stephen Colbert: Trevor Noah, My Morning Jacket. Jimmy Fallon: Idris Elba, Keri Russell, Sabrina Carpenter. Seth Meyers: Ron Howard, Clint Howard, Hillary Clinton, Louise Penny (rerun). James Corden: Joseph Gordon-Levitt, Suni Lee (rerun).