US military history is filled with units whose names not only convey a whiff of battle – 101st Airborne, 1st Air Cavalry, 14th Field Artillery – but also describe what the unit did. But what is one to make of an outfit with such a vague name as 23d Headquarters Special Troops?

That unit consisted of 1,100 troops; and it was special, all right. The 23d, which served during World War II in England, France, Belgium, Luxembourg, and Germany, is the subject of “The Ghost Army.” Written and directed by Lexington resident Rick Beyer, the documentary airs Tuesday night on Channel 2. Peter Coyote narrates.

CAMBRIDGE — It was part college dance, part video game, part Simon Says, part high-tech experiment. Happening — coincidentally — in the rain Sunday night, on darkened Jack Barry Field at the Massachusetts Institute of Technology, “UP: The Umbrella Project” was beautiful and a bit goofy. “UP” is a collaboration between the Connecticut-based dance troupe Pilobolus and the MIT Computer Science and Artificial Intelligence Laboratory (CSAIL). More than 250 students and other members of the MIT community walked and ran and jumped around, holding umbrellas lit from beneath by battery-powered LEDs that changed color on command, operated via buttons on the umbrella handles. From the sidelines, it looked like a traffic jam of Japanese paper lanterns, lovely but chaotic.

Oscar-winning actress Geena Davis returns to Boston Tuesday to raise awareness of an issue she cares deeply about: gender disparity in media programming aimed at young children.

Frontman and songwriter Matt Berninger conveys a lot of emotion in his laconic delivery, which creates a nervous tension in the music.

Give credit to Rucker for jumping from mega-selling Hootie & the Blowfish to take a stab at a country music career.

“King” George may have announced his retirement from extensive touring with his current “Cowbody Rides Away” jaunt, but this release — his 40th! — should reassure his fans that he’s not departing the studio anytime soon.

“Love Is Everything” is not his strongest release of recent years, with a few too many generic midtempo cuts, but it does offer the consistency that has been Strait’s strong suit. His voice is in superb form and when the songs are, too, the album sparkles.

Among the highlights is “That’s What Breaking Hearts Do,” which has a zippy barn-dance swing in its step to match the solemn tears in its beers and conjures a vibe similar to Bruce Springsteen’s “All That Heaven Will Allow.”

The Moroccan-born New Yorker’s long-delayed debut finally arrives, and much of it lands with blunt force without quite demonstrating a fully-formed vision. Montana borrows from various sources for his tales of hedonism and nihilistic street posturing. His verses and music are informed by both East Coast brusqueness and Southern trap music. The strength of the better songs, such as “When I Want” or “[Expletive] What Happens Tonight,” comes from the confrontational rhymes, which have a coked-out aggression

After six years, beloved novelist Khaled Hosseini returns to the rugged landscape of his home country, Afghanistan, which he so evocatively brought to life in his two previous bestsellers, “The Kite Runner” and “A Thousand Splendid Suns.” In “And the Mountains Echoed,’’ however, Hosseini expands his scope out from a rural village to Kabul, Paris, San Francisco, and the Greek isle of Tinos.

In a series of interlocking storylines with shifting viewpoints, Hosseini delves into the joys, sorrows, and betrayals that alternately bind and fracture families. Once again, Hosseini’s lovingly rendered Afghanistan takes center stage, but in this book he extends his examination to encompass how the Afghan identity affects his characters’ decisions and lives in unfamiliar environments.

Globe TV critic Matthew Gilbert chatted with readers Friday on Boston.com. Here are excerpts.

Q. What about the new fall comedies? Anything you’re curious about?

A. I’m curious about “The Michael J. Fox Show.” Could be fun, if they don’t hammer the Parkinson’s jokes too much. He’s done that material on “Curb Your Enthusiasm” and on “The Good Wife.” And he should do some on his own show. But it can’t be the only focus of the series, or it will get old. It’s on Thursdays on NBC, along with Sean Hayes’ show, “Sean Saves the World.”

I’m also curious about the CBS Robin Williams sitcom, “The Crazy Ones.” Will he be annoying? Cute? Hyper? Schmaltzy? I’m an Andy Samberg fan, so his “Brooklyn Nine-West” on Fox appeals

Two of the city’s busiest chamber orchestras — A Far Cry and the Discovery Ensemble — recently announced their programs for next season.

What’s happening in and around Boston.

A. You either love him as is or you walk. It’s very possible that he’ll mature and become more self-sufficient as he gets older, but you can’t count on that. After almost three years, you’re either happy or you have to move on.

A. You either love him as is or you walk. It’s very possible that he’ll mature and become more self-sufficient as he gets older, but you can’t count on that. After almost three years, you’re either happy or you have to move on.

A jury convicted two Mattapan men Monday in the July 2011 double murder of the daughter of a retired Boston ­police detective and her boyfriend inside the couple’s Hyde Park home.

Police are urging residents to keep an eye out for a black bear after one was sighted Sunday in Lincoln and again Monday morning in Weston.

The black bear was reported in the area of Routes 117 and 126 on Sunday and officials believe the animal was likely looking for food. In a message posted on Twitter, Lincoln police recommended residents take down bird feeders and remove other food sources from their yards.

Weston police also received reports Monday morning of a medium-size black bear, over 100 pounds, in the northern part of town, Weston police Lieutenant John Lyons said. It was likely the same bear, he said.

The state transportation secretary hopes to do the same on the Massachusetts Turnpike and the Logan Airport tunnels in coming years.