BEACH GIRLS

Sunday at 8 p.m. on Lifetime

Based on the best-selling novel by Luanne Rice, "Beach Girls," Lifetime's first limited series, premieres with a two-hour opener and runs weekly throughout August. Through the intertwining lives of a widower and two generations of female friends, the story explores the bonds of friendship, the complexities of love, loss and forgiveness and the endurance of family ties.

Rob Lowe and Julia Ormond co-star.

COMET COLLISION!

Sunday at 10 p.m. on Discovery

While you were watching Fourth of July fireworks, a space probe on a one-way mission was blown to bits, having hit a comet half the size of Manhattan with a force equal to 4.5 tons of dynamite. And that was by design, allowing NASA to declare the event a "smashing success."

From its Jan. 12 launch, the extraordinary mission is tracked from its beginning to its end, following scientists, designers and builders who worked to build the craft so it could travel 250 million miles to intercept the comet.

WEIRD U.S.

Sunday at 11 p.m. on History

This new series traces bizarre and unusual stories of American history and tries to find out whether local legends and myths have any validity. Mark Moran and Mark Sceurman host the hour-long segments, which are based on the pair's book of the same name.

In the opening installment, they report on Cold War nuclear bunkers, a circus sideshow retirement community and the case of an executed man whose skin was used to make wallets.

LINGO

Weeknights at 7 and 7:30 p.m. on GSN

Game Show Network's word game show returns for its fourth season. This season includes themed episodes of the high-energy game in which two teams of two players compete to guess concealed five-letter words.

history detectives

Monday at 9 p.m. on MPT,

10 p.m. on WETA

The series returns with a new episode about the founding of the United States. This time, the detectives investigate whether a painting passed down through a Frederick family is an authentic portrait of George Washington.

In the second segment, they look at a Revolutionary War poem in Salem, Ore.; then they head to Massachusetts to document the beginnings of the Revolutionary War.

meet Mister mom

Tuesday at 8 p.m. on NBC

At last, a reality show hard-working mothers can appreciate. When two undervalued moms step out of their daily routine for a luxury vacation, the dads are left to run the house, ride herd on the kids and juggle all the details usually handled by their wives. The absent, anxious moms can watch from afar via closed-circuit TV.

Both families are vying for more than parental pride in this competition: College scholarships are at stake here. No word on whether the dads get a vacation after their stint on the home front.

HI-JINKS

Tuesday at 9:30 p.m. on Nickelodeon

Susan Sarandon, Chris Webber, Vivica Fox, Meredith Vieira and other celebrities play good-natured pranks on bewildered tykes as part of this hidden-camera series premiering on Nick at Nite.

Each 30-minute episode contains capers shot from homes, malls and schools across the country.

WIDE ANGLE: RED LINES AND DEADLINES

Tuesday at 10 p.m. on PBS

Young reporters at Shargh, one of Iran's new pro-reform newspapers, grapple to report the news without incurring what they call "the blade of censorship," an ever-present threat in their country. This documentary features footage of the paper's writers covering Iran's recent -- and controversial -- presidential election.

A post-film interview is conducted by anchor Bill Moyers.

kathy Griffin: My life on the D-List

Wednesday at 10 p.m. on Bravo

This six-episode unscripted series looks at what happens when a comic is preparing an act using material based on her life and celebrity encounters.

Each episode will include a portion of Griffin's stand-up act or public appearances, as well as the behind-the-scenes work that goes into each performance.

SMALL SPACE, BiG STYLE

Thursday at 8 p.m. on HGTV

They say a man's home is his castle, but what if your living space feels more like it was meant for Thumbelina? One look at these pads proves that living in sparse spaces doesn't mean you have to sacrifice style.

The program showcases homes, some in the Washington area, that make the most of their minuscule square footage.

quest for dragons

Thursday at 8 p.m. on HIST

They're creatures of the imagination, breathing fire across cultural lines. This new program explores humans' fascination with the beasts, ranging from how dragon lore began to why many believe in the creatures today.

STARVED

Thursday at 10 p.m. on FX

Four New Yorkers struggle with eating disorders in this new half-hour series, which intends to take a comedic look at the country's obsession with food and the loneliness of single life.

Co-executive producer and writer Eric Schaeffer plays Sam, a neurotic, commitment-phobic commodities broker. Sterling Brown is Adam, a bulimic police officer; Del Pentecost portrays an obese writer named Dan; and Laura Benanti is Billie, an anorexic bisexual folk singer.

IT'S ALWAYS SUNNY IN PHILADELPHIA

Thursday at 10:30 p.m. on FX

The second show in FX's new comedy hour revolves around friends who own a bar and have to overcome their egos to make their friendship and business work. Rob McElhenney, who created the series, stars with Charlie Day, Jordan Berkow and Glenn Howerton.

DAYS THAT SHOOK THE WORLD: HIROSHIMA

Saturday at 8 p.m. on HIST

Sixty years ago Saturday, a B-29 bomber took off from an island in the South Pacific on a clandestine operation. The atomic bomb it dropped on Hiroshima, Japan, changed the world forever. This film provides insight into the tragic story of Hiroshima from those directly involved. Afterward, "Hiroshima: The Decision to Drop the Bomb" explores the thought process behind the attack.

-- Compiled and written by the TV Week staff