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: “Lioness” wraps Season 3, “Best Medicine” gets a head start on Season 2, and Jon Hamm leads “American Hostage.”
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Showtimes for September 20, 2026
Cold as Balls
Kevin Hart gets into the ice tub with Serena Williams, Novak Djokovic, Rob Gronkowski, Cooper Flagg, Sean O’Malley, Zlatan Ibrahimović, and IShowSpeed for a new round of unconventional athlete interviews.
Lioness
Season 3 finale: Kyle’s chase sparks deadly fallout as Joe uncovers a wider plot.
Stop! That! Train!
When a catastrophic “Stormaganza” threatens to derail a high-speed train and crash it into Los Angeles, two best friends (Ginger Minj and Jujubee) must join forces with the snobby first-class attendants (Symone, Brooke Lynn Hytes, Marcia Marcia Marcia) and President Gagwell (RuPaul) to save the day.
Saturday Night Live UK
Jamie Demetriou hosts; Royal Blood performs.
Sunday Night Baseball
Season 37 finale: The Milwaukee Brewers play the Baltimore Orioles, live from Camden Yards in Baltimore.
Best Medicine
Season 2 premiere: A mermaid washes ashore in Port Wenn to the amazement of everyone in town; Judith, a well-meaning townsperson (guest star Andrea Martin), creates havoc while on prescribed oxygen. (Premiere re-airs in its regular time slot, Tuesday at 8/7c.)
Big Brother
The final five houseguests battle to win Head of Household; three new nominees hit the block.
Kimora Lee: On Her Own
Lee reflects on the personal and professional challenges that shaped her life, the sacrifices behind her success, and her determination to reclaim her voice in this new documentary.
The Marlow Murder Club
When a man is killed at her university reunion, Becks finds herself on the wrong side of an investigation.
American Hostage
Series premiere: An Indianapolis radio reporter (played by Jon Hamm) is thrust into the middle of a life-or-death crisis when a hostage taker (Giovanni Ribisi) demands to be interviewed on his program; Mireille Enos, Kristoffer Polaha, and William Jackson Harper co-star.
Best of VMAs: Unforgettable Moments
Vanessa Lachey hosts a look back at the VMAs’ most memorable moments, from bold fashion choices and collaborations to career-defining performances.
The Detour With David Chang
The six-part docuseries follows the chef, restaurateur, and author in his pursuit of no-frills but unforgettable eats on the open road.
High Value Target: The Hunt for Saddam
John comes face to face with Saddam Hussein; the Insurgents remount their attacks.
Lanterns
The investigation into Hal Jordan’s death picks up steam this week.
Marble Hall Murders
As Eliot’s health deteriorates, he accuses his family of murder; Atticus Pund closes in on his prime suspect.
The Real Housewives Ultimate Girls Trip: Roaring 20th
The ladies head to the Big Apple where Dorinda brings back the iconic Gangster Brunch; a moving reading from Carole has the women reflecting on the sisterhood forged through years in the “Housewives” spotlight.
Trespasses
Stateside premiere: The series follows a young Catholic schoolteacher (Lola Petticrew) in 1975 Northern Ireland who embarks on a dangerous affair with an older, married Protestant barrister (Tom Cullen); Gillian Anderson co-stars.
Youth
Series premiere: Creator Sharon Horgan plays a 50-year-old divorcee in search of sex and love whilst juggling caring for her ailing parents and parenting her should-be grown-up son; Sharlene Whyte, Rupert Friend, Aran Murphy, and Robbie Gee co-star.
President Curtis
With Christmas spirit at an all-time low across the country, Curtis attempts to find a fix by deploying a group of synthetic beings, custom-designed to spread cheer.
