March Madness begins in earnest with “Bracketology” (7 p.m., ESPN), an exhaustive look at the teams and seeds and rivalries in the NCAA finals. The documentary “Fab Five” (9 p.m., Sunday, ESPN) follows, recalling the University of Michigan teams of the 1990s Led by Chris Webber, Jalen Rose and Juwan Howard.

• If YouTube has taught us anything, it’s that people never tire of watching animals doing silly things, often while wearing funny little outfits. Add talking, anthropomorphized characters and punch line-heavy dialogue to that mix and you’ve got “Beverly Hills Chihuahua 2” (8 p.m., ABC Family), the made-for-cable sequel to the 2008 Disney big-screen hit. George Lopez returns to voice the big-hearted but diminutive Papi.

Don’t go listening for Drew Barrymore or Jamie Lee Curtis, whose voices appeared in the original “Beverly Hills Chihuahua” (7 p.m.). But this sequel has a remarkable cast providing voices for the four-legged set, including Olivia Newton-John, Ernie Hudson, French Stewart and Emily Osment.

Few genres remain as critic-proof as the talking-dog picture. And just when you thought things couldn’t get any cuter, Papi’s new bride, Chloe (Odette Yustman), gives birth to puppies.

• A week before the finale of the fictional HBO series “Big Love,” the reality series “Sister Wives” (8 p.m., TLC) enters its second season. This follows the polygamous marriage between Kody Brown and his four wives. While season 1 focused on his introduction of spouse No. 4 into the mix, this season parallels “Big Love” as Kody and company come under legal scrutiny for their illegal lifestyle.

It’s interesting that “Big Love’s” make-believe patriarch, Bill Henricksen (Bill Paxton), has emerged as a three-dimensional and often tragic figure, while real-life Kody has the shallow, self-satisfied veneer of a televangelist or game-show host.

Tonight’s other highlights

• Logo design looms large on “America’s Next Great Restaurant” (7 p.m., NBC).

• The mayor’s victory is tempered by Newark’s fiscal crises on the season finale of “Brick City” (7 p.m., Sundance).

• Time for a lockdown on “Big Love” (9 p.m., HBO).

• A select hunting club preys on humans on “CSI: Miami” (9 p.m., CBS).

• Luc offers advice on “Brothers and Sisters” (10 p.m., ABC).

Series notes

Provincial China proves challenging on “Amazing Race” (7 p.m., CBS) … Cheech and Chong guest star (as themselves) on “The Simpsons” (7 p.m., Fox) … Down and out in Detroit on “Secret Millionaire” (7 p.m., ABC) … B&B blues on “Bob’s Burgers” (7:30 p.m., Fox) … A shipping lines boss feels overpacked on “Undercover Boss” (9 p.m., CBS) … Peter witnesses a no-no on “Family Guy” (8 p.m., Fox) … Gabrielle spills her secrets on “Desperate Housewives” (8 p.m., ABC)