“Chaos” (CBS at 8 p.m.), a new series about a wacky group of CIA spies, is reviewed in the Style section by Hank Stuever.

Military Channel launches new franchise “An Officer and a Movie” (at 8), which features host Lou Diamond Phillips talking with a Marine officer in segments throughout a military-themed movie. Filmed in downtown Silver Spring, Phillips interviews retired Marine Col. Arthur Athens and discusses the featured film, 1979’s “The Great Santini,” starring Robert Duvall as a military pilot.

Gwyneth Paltrow learns many new facts about her great-grandmother on “Who Do You Think You Are?” (NBC at 8) and learns more about her ancestors, including roots in Barbados.

All kinds of problems hit “Say Yes to the Dress” (TLC at 9), particularly when one bride returns for a fitting, only to find she’s trying on a

different gown; meanwhile, another bride-to-be frustrates everyone when she won’t come out of her dressing room.

In honor of April Fool’s Day, Investigation Discovery takes a look at the dark side of tricks with one-hour special “I Was Conned” (at 9), which examines what happens when unsuspecting people fall victim to con artists.

“Camelot” (Starz at 10), a drama that tells the classic story of King Arthur and Merlin, is reviewed in the Style section by Hank Stuever.

The sisters are busy creating a lion sculpture for an Asian Pacific cultures event on “DC Cupcakes” (TLC at 10, 10:30), so Andres handles making a cupcake inspired by Asian-style flavors. Later, staffers of the Georgetown store make cupcakes for the Boys & Girls Clubs and build a special creation for the Girl Scouts.

A dangerous drug lord, who makes a habit of intimidating witnesses, goes after Danny’s family when Danny witnesses a murder on “Blue Bloods” (CBS at 10).

Writer Randy Cohen, commentator Doug Heye and Sen. Bernie Sanders (I-Vt.) make up the round table on “Real Time With Bill Maher” (HBO at 10), interviewing artist Julian Schnabel and Special Olympics chief executive Tim Shriver.

Actor Vin Diesel visits “The Tonight Show With Jay Leno” (NBC at 11:35), along with actress Ashley Tisdale and musical guest Scissor Sisters.

“Late Show With David Letterman” (CBS at 11:35) hosts actor James Franco and band the Royal Bangs.

— Emily Yahr