iZombie-e1421019898595On the charming new “iZombie” (The CW, 9 p.m.), Rose McIver plays a former medical student bummed that she’s become a zombie. But while eating human brains, she also gets jolts of their old memories, which of course makes her an aid to homicide detectives. Rob Thomas and Diane Ruggiero-Wright, who know a thing or two about making an entertaining series, are bend the show, which also stars Malcolm Goodwin.It comes alongside the network’s established success “The Flash” (The CW, 8 p.m.).

A new show getting more attention is “One Big Happy” (NBC, 9:30 p.m.) a dumb sitcom about a lesbian and a straight male friend who decide to have a baby together except that he meets a girl at a bar and gets married right away. So now they’re all living together like one unrealistic family, full of dumb gags. Elisha Cuthbert, once little Kim on “24,” has learned a lot about comedy from being in “Happy Endings.” But she can’t save this thing from producer Ellen DeGeneres. The rest of its cast has a dud Nick Zano and Kelly Brook, whose main job is to shake her chest.

It accompanies an unexpected new season for “Undateable” (NBC, 9 p.m.), a generally unwatchable  Bill Lawrence comedy supposedly set in Detroit (they’re wearing the city’s sports gear, anyway) about guys who are trying to hit on women.

There are better prospects for the sixth season of “Community” (Yahoo, streaming) though it’s been bumped from network to online. Not everybody stayed around for the transition. Yvette Nicole Brown is gone; Paget Brewster and Keith David have been added. Unlike other streamed shows, this season won’t be available all at once. Like its network roots, it will be released episode by episode, each Tuesday.

A hint of March Madness tiptoes in with the first half of four play-in games. Tonight has Hampton vs. Manhattan (TruTV, 6:30 p.m.) and BYU vs. Mississippi (TruTV, 9 p.m.).

The NIT tournament is up and running though, with George Washington at Pittsburgh (ESPN, 7 p.m.), North Carolina Central at Miami (ESPN2, 7 p.m.), Iona at Rhode Island (ESPNU, 7 p.m.), Illinois at Alabama (ESPN, 9 p.m.), UTEP at Murray State (ESPN2, 9 p.m.), Montana at Texas A&M (ESPNU, 9 p.m.) and UC Davis at Stanford (ESPN2, 11 p.m.).

The efforts of a small South Carolina town to reform its education system is explored on the two part “180 Days: Hartsville” (PBS, 8 and 9 p.m.), both parts of which are shown.

Ava is caught in the middle again on “Justified” (FX, 10 p.m.).

Home birth is so passé. The new challenge is to have been “Born in the Wild” (Lifetime, 10 p.m.), as the outdoorsy couples in this series demonstrate.

Chef Michael Cimarusti presides over a seafood competition on “Hell’s Kitchen” (Fox, 8 p.m.).

A quarter century ago, while the rest of Boston was celebrating St. Patrick’s Day, thieves broke into the Isabella Gardner museum for the greatest unsolved art heist in the city’s history — one that remains unsolved. The heist is revisited tonight on “CNN Special Report” (CNN, 9 p.m.).

Otherwise, St. Patrick’s Day brings “Odd Man Out” (TCM, 8 p.m.), “The Rising of the Moon” (10:15 p.m.), “Beloved Enemy” (midnight) and “Ryan’s Daughter” (1:45 a.m.).

Syfy network, for one, abdicates its responsibility to show the “Leprechaun” horror films tonight. Instead, new episodes of “Face Off” (Syfy, 9 p.m.) and its spin-off, “Close-Up Kings” (Syfy, 10 p.m.).

NBA action has Milwaukee at New Orleans (NBA, 8 p.m.). In hockey, it’s Buffalo at Boston (NBC Sports, 7:30 p.m.).

Spring baseball has Atlanta vs. Boston (MLB, 1 p.m.), Angels vs. Colorado (MLB, 4 p.m.) and Toronto vs. Yankees (MLB, 7 p.m.).

Daytime Talk

Kelly & Michael: Theo James, Kyle Chandler, Emmy Rossum. The View: Jason Biggs, Maggie Q, Raven-Symone. The Talk: Jason Ritter, Michael Yo, Lillana Vazquez, Carnie Wilson & Dania Ramirez. Ellen DeGeneres: Madonna, Elisha Cuthbert, Nick Zano, Kelly Brook. Wendy Williams: Bryshere Y. Gray. Meredith Vieira: Julianne Hough, Carrie Ann Inaba, Barbara Corcoran. Queen Latifah: Sharon Osbourne, Ru Paul, Dustin Lynch (rerun).

Late Talk

David Letterman: Will Ferrell, Glen Hansard. Jimmy Fallon: Jennifer Garner, Eugene Levy, Modest Mouse. Jimmy Kimmel: Julia Louis-Dreyfus, Robert Rodriguez, Spoon. Seth Meyers: Shailene Woodley, Jason Biggs, Alex Gibney. Late Late Show: Matthew Perry, Nick Kroll, Thomas Lennon (rerun). Carson Daly: Katheryn Winnick, Tijuana Panthers, Dan Ahdoot. Tavis Smiley: J. Cole. Jon Stewart: Amanda Seyfried. Conan O’Brien: Zachary Quinto, Kristen Schaal, OK Go.