CLIFFORD'S Puppy DAYs

Weekdays at 8 a.m. on MPT;

Thursdays at 8:30 a.m. on WETA

The bright red dog with the unstoppable grin unleashes a new season of his "Puppy Days" episodes this week with a two-hour special "Puppy Power Hours" Wednesday at 7 a.m. on PBS. As always, Clifford's own adventures with his animal and human friends offer kids a way to learn life lessons on emotional and social levels. Clifford's yearlong campaign to "Get Up & Grow" will include online activities at http://pbskids.org/clifford.

martha

Weekdays at 10 a.m. on WJLA

She's so back. Sans that federally issued ankle bracelet, Martha Stewart returns to daytime TV in this daily syndicated show.

Her previous daytime series featured taped segments with Stewart in a kitchen or garden. This time, she'll offer her signature cooking and craft demonstrations in front of a studio audience. And Stewart is planning to have some fun with that: One audience will include guests wearing handmade ponchos like the crocheted one Stewart wore upon leaving prison in March. Another day, seats will be filled entirely by women named Martha Stewart -- any spelling will do. She'll also interview celebrities, spotlight outstanding students and even help the country's worst cooks. Yes, it's a good thing.

in the balance: Bioattack

Monday at 10 p.m. on MPT, 11 p.m. on WETA

The first of a two-part series dramatizes a biological attack and asks a panel that includes public officials, members of the media and citizens to react to the situation. Part 2 airs next week and features a scenario with a "dirty bomb" reportedly targeting a harbor on the Fourth of July. Cynthia MacFadden moderates.

ernest hemingway: rivers to the sea

Wednesday at 9 p.m. on PBS

This new American Masters documentary explores the life and work of an author still widely read more than 40 years after his death. Hemingway's profile was more akin to a movie star than a reclusive author; he wrote freely about his own interests and experiences.

Made in the USA

Wednesday at 10 p.m. on USA

If you've ever had a brilliant idea for the world's greatest invention, you'll get a vi-carious thrill from this reality competition.

Each week, the participants will compete in the kind of challenges faced by inventors everywhere -- getting their products in front of the public. One by one, aspiring inventors and entrepreneurs will be eliminated. The winner will land a deal with the Home Shopping Network.

The show's judges include Joy Mangano, inventor of "the Miracle Mop"; Nolan Bushnell, who founded the Chuck E. Cheese restaurant chain; and Karim Rashind, who has designed for Prada.

pRimetime

Thursday at 9 p.m. on ABC

The blended families of the 21st century are light-years away from the simplicity of "The Brady Bunch." Diane Sawyer explores the complexities of relationships between stepparents and stepchildren in this two-hour program.

Jules verne's Mysterious Island

Saturday at 8 p.m. on Hallmark

This new version of Verne's classic science fiction tale once again brings to life the timeless story of survival.

Passengers aboard a hot-air balloon find themselves far from their Civil War-era Richmond home after their craft crashes on an island. Marooned and desperate, the castaways must battle hunger, pirates, wild weather and giant reptiles. They also face the secrets of the uncharted island, where they struggle to build a community and live in their new utopian world.

-- Written and compiled by the TV Week staff