Grim is the overlying feel of “Chernobyl” (HBO, 9 p.m.), a new miniseries that revisits the 1986 Russian nuclear disaster, which begins with the suicide two years later of a scientist that looked into the event and then goes back to the initial explosion, dismissed at the time by locals as a roof fire. Jared Harris and Emily Watson star, but aren’t seen much in the debut.
“State of the Union” (Sundance, 10 p.m.), a lively back-and-forth among a couple grabbing a drink before their marriage therapy sessions. As written by Nick Hornby, it’s full of funny and snide dialogue and stars Rosamund Pike and Chris O’Dowd are more than up for delivering it. It’s rather like that old HBO series about a therapists’ sessions, “In Treatment,” except way more entertaining. The oddest thing about the series is that it is cut up into teeny episodes that literally only last 10 minutes each. I watched it all wrong — all 10 episodes at once; about the same length as a movie — and was just as please; I don’t know how it will play out in bite-sized portions weekly.
The “E! Live from the Red Carpet” (E!, 5 p.m.) covers an event where what people are wearing is actually the story, the annual Met Gala. Fabulous costumes from invited celebrities and guests are expected at the Metropolitan Museum of Art fundraiser, whose theme this year is camp.
In the imported South Korean series, “Abyss” (Netflix, streaming) two recently deceased people return to Earth in new bodies better suited to their personalities.
The franchise rather revels in its hyperbole, hence the special “Bachelorette Reunion: The Biggest Bachelorette Reunion in Bachelor History Ever!” (ABC, 8 p.m.).
The second season finale of “The Resident” (Fox, 8 p.m.) has Bell considering whether to sell the hospital.
Other season finales come for the sitcom “Man with a Plan” (CBS, 8:30 p.m.), and the fantasy dramas “Shadowhunters” (Freeform, 8 p.m.) and “Into the Badlands” (AMC, 10 p.m.), which each carry a more apocalyptic bent.
Lister admits her hopes for a future with Ann Walker to her aunt on “Gentleman Jack” (HBO, 10 p.m.).
Hawaiian prisoners shipped to Arizona rediscover their cultural roots in a new film on “Independent Lens” (PBS, 10 p.m.).
“The Best Thing I Ever Ate” (Cooking, 9 p.m.) returns for a 10th season.
The Top 13 perform on “The Voice” (NBC, 8 p.m.).
Rory creates a rift on “DC’s Legends of Tomorrow” (CW, 8 p.m.).
On “When Calls the Heart” (Hallmark, 8 p.m.), Elizabeth catches Nathan’s niece gambling.
Secrets arise at a couples retreat on “Love & Hip Hop Atlanta” (VH1, 8 p.m.).
“9-1-1” (Fox, 9 p.m.) deals with a chocolate factory calamity.
A warrant arrives for Felicity on “Arrow” (CW, 9 p.m.).
Two Marines are killed in a weapons test on “The Code” (CBS, 9 p.m.).
On “The Enemy Within” (NBC, 10 p.m.), hostages are taken in the Swedish Embassy.
Evidence seems planted on “The Fix” (ABC, 10 p.m.).
“Spring Baking Championship” (Food, 9 p.m.) spends its finale baking Mother’s Day cakes.
And there are more hosannas to mom on the special “Dear Mama: A Love Letter to Mom” (VH1, 10 p.m.).
The Knights Templar are captured and sent to Paris for trial on “Knightfall” (History, 10 p.m.).
“T.I. and Tiny: Friends and Family Hustle” (VH1, 9 p.m.) deals with the loss of Precious.
A prison guard is charged with murdering two inmates amid a hurricane on “Bull” (CBS, 10 p.m.).
“Vanderpump Rules” (Bravo, 9 p.m.) begins its reunion episodes.
Kyle comes clean on “Summer House” (Bravo, 10 p.m.).
A night of black cinema on Turner Classic Movies is hosted by author and film historian Donald Bogle whose latest book is called “Hollywood Black: The Stars, the Films, the Filmmakers.” showing is “Cabin in the Sky” (8 p.m.), “Bright Road” (10 p.m.), “A Raisin in the Sun” (11:30 p.m.), “Shaft” (2 a.m.), “Within Our Gates” (4 a.m.) and “The Jackie Robinson Story” (5;15 a.m.).
NBA Playoffs have Milwaukee at Boston (TNT, 7 p.m.) and Golden State at Houston (TNT, 9:30 p.m.).
Stanley Cup Playoffs have Boston at Columbus (NBC Sports, 7 p.m.) and San Jose at Colorado (NBC Sports, 10 p.m.).
Baseball includes San Francisco at Cincinnati (MLB, 12:30 p.m.) and Philadelphia at St. Louis (ESPN, 8 p.m.).
Sunday’s rain-postponed Gander RV 400 (Fox Sports 1, noon) will instead be run today in Dover, Del.
College baseball has Boston College at Virginia Tech (ESPNU, 7 p.m.).
Daytime Talk
Kelly Ripa and Ryan Seacrest: Taraji P. Henson, Miss USA Cheslie Tryst, Dr. Wendy Bazilian. The View: Rep. Dan Crenshaw. Ellen DeGeneres: Julie Bowen. Wendy Williams: Michael Yo, Melissa Garcia. The Real: Paige.
Late Talk
Stephen Colbert: Common, Rachel Dratch, Maren Morris. Jimmy Kimmel: Diane Keaton, Samin Nosrat, YG with Toga and Jon Z. Jimmy Fallon: Will Smith, Laurie Metcalf, Phil Hanley. Seth Myers: Keri Russell, Ana Gasteyer, Alex Brightman, Phillip Fisher. James Corden: Charlize Theron, Seth Rogen. Carson Daly: Pam Grier, Ex Hex, Sarah Goldberg. Trevor Noah: Eddie Izzard. Conan O’Brien: Martin Short.