westworld-season-3The second season of the sleek sci-fi reboot “Westworld” (HBO, 9 p.m.) sort of defined going off the rails. But with the monumental sidetracks of the kung fu world ending with a bloodbath, it resets with an intriguing looking season in which the robots sneak into the surrounding and very futuristic human world to eke revenge. The architecture and design is reason enough to tune in, but there is also the key additions of Aaron Paul and Lena Waithe to the already-strong cast of Even Rachel Wood, Jeffrey Wright, Thandie Newton and Ed Harris (a recurring line seems to be “How are you still alive?”). But there’s still room for serious sidetracking in the final season, including a ho-hum World-War II reenactment “WarWorld” unveiled in episode two. But the human-world stuff is cool.

“Black Monday” (Showtime, 10 and 10:30 p.m.), whose very title concerns the 1987 stock market crash, returns for its second season days after the worst financial meltdown since then. The series starring Don Cheadle, Regina Hall and Andrew Rannells proved in its first season to be one of the sharper written and funniest things on TV.

The latest Democratic Presidential Debate (CNN, Univision, 8 p.m.) will be much different than earlier ones. Instead of many candidates, just the two who remain, Joe Biden and Bernie Sanders. Instead of an audience, an empty studio and no spin room. Rather than the originally planned Arizona as the site, it will air from Washington D.C. And one of the planned moderators from Univision Jorge Ramos has stepped away because of possible coronavirus exposure. There will be a lot to talk about.

The demise of campaigning in general because of the pandemic is covered on “The Circus: Inside the Craziest Political Campaign on Earth” (Showtime, 8 p.m.).

There’s a contagious disease on “When Calls the Heart” (Hallmark, 8 p.m.), but it’s only chickenpox.

But “How the World Ends” (Travel, 9 p.m.) is about doomsday preppers reacting to the threat of nuclear war.

Chris Hardwick hosts both “Talking Dead” (AMC, 10 p.m.) and “The Wall” (NBC, 7 p.m.) the half-forgotten game show that has nothing to do with border security.

“Homeland” (Showtime, 9 p.m.), an upheaval in Washington brings a Kabul investigation.

With all the comic talent involved “Avenue 5” (HBO, 10:15 p.m.) never quite took off as it should. But its first season finale is here.

There will be an abbreviated “This Week Tonight with John Oliver” (HBO, 11:22 p.m.) with no audience, before it takes a previously unscheduled hiatus.

It follows a new “Curb Your Enthusiasm” (HBO, 10:45 p.m.), which has been pretty good this season.

Auditions end, as planned, on “American Idol” (ABC, 9 p.m.).

Jamie and his militia arrive at Hillsborough on “Outlander” (Starz, 8 p.m.).

“Bob’s Burgers” (Fox, 9 p.m.) celebrates St. Patrick’s Day.

Nia’s roommate is attacked on “Supergirl” (CW, 9 p.m.).

“The Walking Dead” (AMC, 9 p.m.) may start to look awfully familiar.

Why must there be so much competition in baking? If they worked together, Buddy Valastro and Duff Goldman could open the best baker. Instead, there’s season two of “Buddy vs. Duff” (Food, 9 p.m.).

“NCIS: New Orleans” (CBS, 9 p.m.) has two episodes back-to-back.

One thing missing from Titanic disaster? Conspiracy theories! To dig up some is the special “Titanic: Conspiracy of Failure” (Science, 8:30 p.m.).

Alice’s dark past is uncovered on “Batwoman” (CW, 8 p.m.).

On “God Friended Me” (CBS, 8 p.m.), Miles helps an old theater.

Kenya asks the wrong questions on “The Real Housewives of Atlanta” (Bravo, 8 p.m.).

Bart bonds with Ned Flanders on “The Simpsons” (Fox, 8 p.m.).

The family on “Duncanville” (Fox, 8:30 p.m.) is flummoxed by its smart fridge.

“Our Cartoon President” (Showtime, 8:30 p.m.) aligns with the dictators.

A second season starts for the comedy “Just Roll with It” (Disney, 8:48 p.m.).

Things get complicated at Simon’s engagement party on “Zoey’s Extraordinary Playlist” (NBC, 9 p.m.).

“Good Girls” (NBC, 10 p.m.) try to strong-arm Lucy.

There may be national security implications in the latest murder on “The Rookie” (ABC, 10 p.m.).

Small task for “Rob Riggle: Global Investigator” (Discovery, 10 p.m.) is finding the Holy Grail.

One of the “Sister Wives” (TLC, 10 p.m.) is gay.

Women pretend to be little girls are in two Turner Classic Movies tonight, “The Major and the Minor” (8 p.m.) and “Too Young to Kiss” (10 p.m.). Then comes the silent class drama “The Blot” (midnight) from director Lois Weber, and Satyajit Ray’s “The Big City” (2 a.m.).

No sports!

Sunday Talk

ABC: Dr. Anthony Fauci, National Institutes of Health infectious diseases chief; treasury secretary Steven Mnuchin. CBS: Fauci, White House economic adviser Larry Kudlow, former Food and Drug Administration commissioner Scott Gottlieb, Bank of America CEO Brian Moynihan. NBC: Fauci, Ohio Gov. Mike DeWine, Illinois Gov. J.B. Pritzker. CNN: Fauci, DeWine, New York City Mayor Bill de Blasio. Fox News: Fauci, Mnuchin.