After being in the bottom two last week, Howard University’s Afro Blue is still hanging on in singing competition “The Sing-Off” (NBC at 8), as the top five a cappella groups open with a James Brown-Beyonce-Jackson 5 medley before trying to impress the judges with R&B songs.

“Antiques Roadshow” (WETA and MPT at 8) goes themed with food- and drink-related antiques, such as a toy coffee service made of 18th-century porcelain and a meat-serving cart from the 1930s.

Barney and Robin’s significant others probably aren’t thrilled that the two still hang out together — but they’ll be even less happy when it turns out the once-dating duo is keeping a secret from everyone else on “How I Met Your Mother” (CBS at 8).

New series “Saved” (Animal Planet at 8) looks at the animal-human connection and various stories about how animals have saved people during very dark times. In the premiere, a family’s dog helps them recover from the death of their son in Iraq.

Max and Caroline get tangled up with Johnny’s jealous girlfriend, who comes up with a plan that involves baking cupcakes for Johnny’s art show on “2 Broke Girls” (CBS at 8:30).

“Basketball Wives LA” (VH1 at 8) wraps up for the season with some shocking news about the relationship between Lakers player Matt Barnes and Gloria Govan . . . except it’s not so shocking for anyone who (a) cares enough to keep track and (b) uses the Internet, in which case you would have seen that they split weeks ago.

Right after “Basketball Wives” ends, “Love & Hip Hop” (VH1 at 9) begins, as the second season kicks off and follows six women making their way in the music world.

About 10 months after the tragic shootings in Tucson at a community event for Rep. Gabrielle Giffords, ABC airs “A Special Edition of 20/20 — “Gabby and Mark: Courage and Hope” (ABC at 10). In her first television interview since she was shot, the Arizona Democrat sits with her husband, retired space shuttle commander Mark Kelly, and talks with Diane Sawyer about the past year.

“The Tonight Show With Jay Leno” (NBC at 11:35) hosts actress Amy Adams, the stars of “Rocket City Rednecks” and country singer Miranda Lambert.

Actor Jason Segel visits “Late Show With David Letterman” (CBS at 11:35), along with chef Jamie Oliver and musical guests the Kooks.

Emily Yahr