Every day, TVLine’s What to Watch column spotlights new and returning English-language shows (and select movies) premiering or airing fresh episodes across broadcast, cable and streaming — organized below by release time and alphabetically within each slot.
On TV this Sunday: Michael Malarkey visits “Tracker,” a serial killer stalks “The Simpsons,” and a drone crash causes chaos on “Marshals.”
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Showtimes for October 18, 2026
Saturday Night Live UK
James Norton hosts; The Streets performs.
Amish Revenge
A widowed Amish mother (Boti Bliss) takes in a handsome young man (Brigdon York) who claims to be homeless, only to discover that he isn’t who he says he is.
Mr. & Mrs. Christmas
Hallmark ChannelMOVIE PREMIERE
A holiday display expert (Brendan Penny) relocates with his children to a quaint town, where reviving its Christmas Market brings him together with a practical accountant (Pascale Hutton) hoping to prove she’s ready for a new leadership role.
Professor T
Season 5 premiere: Jasper’s new relationship is put to the test when a mysterious death arouses his suspicions.
The Real Housewives of Potomac
Karen celebrates her return home with a party theme that no one can decode; Gizelle tries to restore her friendship with Tia.
The Simpsons
In a new “Treehouse of Horror” episode, all hell breaks loose on Halloween when a killer comes to Springfield and hacks their way through town.
Animal Control
Frank goes undercover at Roman’s new privatized animal control company, Pax Romana.
Marshals
The Marshals are sent to track three Broken Rock residents accused of shooting down a military test drone; tensions rise between federal authorities and tribal leadership after the drone crash takes the life of a Broken Rock member.
American Hostage
Fred wrestles with selling the false immunity agreement to Tony over the air, taking the story back to 1972.
Maigret
Season 2 premiere: Maigret investigates a young woman’s death, putting himself directly in the path of people who will do anything to keep the truth hidden.
The Pet Cemetery Murders
Detectives make strides in Dorothy’s case, and an unlikely witness comes forward with a vexing admission; details emerge about Dorothy’s struggles with addiction and the mysterious deaths of her past husbands.
Universal Basic Guys
Darren becomes a summer camp lifeguard; Mark and Hank get into magnet fishing.
Grimsburg
Stan breaks bad to help Dr. Pentos sell illegal candy to students at the middle school; Flute mentors Otis for his first undercover operation.
Tracker
Colter gets hired to track down a woman who disappeared after an argument with her husband in a deserted Texas town; an unexpected reunion with an old friend (Michael Malarkey), leaves Reenie revisiting her past.
The Gold
Season 2 premiere: The police chase the other half of the stolen Brink’s-Mat gold when it resurfaces; in Tenerife, John Palmer’s successful timeshare business starts to attract unwanted attention.
Treasure Island
Onboard the Hispaniola, Bess targets Graham for protection as Long John lays the groundwork for mutiny with the crew; when violence erupts, Jim makes a calculated move that shifts the balance, tipping the scales in Long John’s favor.
Youth
After getting asked out on a date, Alex tries to make sense of where things stand with Patrick; as Ruari starts his internship at the agency, Sam and Alex attempt to win back Malcolm before Grayson swoops in.
