Grades 7-12; 30-minute episodes
 Watch FRONTIERS online, visit the show Web site, read the show transcript, and view teaching guides.

#1501 SURGICAL SLIMMERS
In spite of the risks, people are lining up to solve their weight problems in the operating room. And if the latest device - an implantable stomach "pacer" - works out, millions more will be taking the surgical way out.

#1502 CARS THAT THINK
The fully automatic car may be down the road a ways, but cars that do your thinking for you are just around the corner - they watch out for hazards, they listen to you, they read your lips, they even know when you're distracted.

#1503 GOING DEEP
This episode takes a look back at the decades of effort that culminated in the deep sub Alvin reaching the ocean floor, and looks forward to what's next.

#1504 CHIMP MINDS
This program visits with an engaging if unruly bunch of cousins that we formally broke up with about six or seven million years ago - with whom we share almost all of our genes, but not a lot of our lifestyle. Why the difference? Maybe it's in how we learn.

#1505 HOT PLANET - COLD COMFORT
So you think global warming won't affect you? Wait until the great Atlantic Conveyor shuts down. And find out what's already happening in Alaska.

#1506 HYDROGEN HOPES
We've all heard of hydrogen as the fuel of the future, but what will it take to get there from here? How can we create hydrogen from renewable sources like the sun? And how do we store it safely once we've got it?

#1507 HIDDEN MOTIVES
If you think you know why you do things, you're probably wrong. This program explores how our unconscious determines our behavior -- including why we buy things that are "cool."

#1508 THE SECRET CANYON
The best-kept secret of American archeology is now revealed - an entire canyon of perfectly preserved 1,000-year-old remains. Who were these people - and where did they come from?

#1509 CYBERSENSES
Replacement synthetic senses for people are now a reality. Children as young as 12 months are already getting artificial hearing -- while the first trials of electronic retinas for the blind are just beginning. Download our lesson plan in which students try their hand at sound making and sound transfer. http://www.pbs.org/saf/1509

#1510 ROBOT PALS
To be really useful, robots need to behave as cooperative partners rather than mindless machines. We'll meet three robots -- including a future member of an astronaut team -- that are trying to better understand us. Download our lesson plan in which students create and explore six basic facial expressions. http://www.pbs.org/saf/1510

#1401 LOSING IT
Scientists try to figure out the body's complex weight-regulation system, while Alan and 10 volunteers try to shed unwanted pounds.

#1402 DON'T FORGET!
Scientists attempt to unravel the mysteries of memory -- how we make them, where they come from and why some slip away.

#1403 FUTURE CAR
Alan visits the research labs and testing tracks of the Big 3 automobile makers to find technologies that will fuel the cars of the future.

#1404 HOT TIMES IN ALASKA
Melting glaciers, dying forests, and disappearing lakes; Scientists explain why warmer temperatures are cause for alarm.

#1405 THE DARK SIDE OF THE UNIVERSE
New discoveries about Dark Matter and Dark Energy have astronomers wondering if ours is but an infinity of universes.

#1406 COMING INTO AMERICA
Who were the first Americans? New discoveries and techniques for dating have archeologist rethinking what they know-- and rewriting history.

#1301 UNEARTHING SECRET AMERICA
Archaeologists shed new light on life in colonial America.

#1302 MAKE UP YOUR MIND
Scientists look to the brain's frontal lobe as the seat of personality.

#1303 THE INTIMATE MACHINE
Scientists blend technology with sociology to make our machines more fun to use.

#1304 FOREVER WILD
Scientists scramble to understand the intricate natural systems on which all life depends-before it's too late.

#1305 MYSTERIES OF THE DEEP
Scientists unlock secrets from the last frontier on Earth - the ocean depths.

#1306 DEEP CRISIS
Investigating the past, present and uncertain future of the ocean's long-distance travelers -- salmon and tuna.

#1307 THE WONDER PILL
Scientists attempt to untangle and harness the mysterious power of the placebo affect.

#1308 CALLS OF THE WILD
Researchers listen in on animal communication as birds, bees, bugs, bats and elephants flirt, eavesdrop and even give directions.

#1309 YOU CAN MAKE IT ON YOUR OWN
From scientists to musicians, people are using technology in creative new ways: converting the digital to the tangible.

#1310 WORRIED SICK
The "fight or flight" response to stress once helped us evade predators, but its long term effects can get us into an different kind of trouble - ill health.

#1201 PET TECH
Where the worlds of hi-tech and the family pet converge. Alan trains a virtual dog and discovers Internet links for lonely parrots.

#1202 THE GENE HUNTERS
Alan meets some of the brightest and most charismatic scientists hunting genes.

#1203 DEAD MEN'S TALES
Meet the scientists who combine high-tech tools and old-fashioned sleuthing to bring the past alive.

#1204 ALIEN INVASION
Globalization means increasing threats from alien species of plants, animals, insects and diseases.

#1205 GROWING UP DIFFERENT
Alan meets some children who face challenges far beyond the usual stresses and strains of growing up.

#1206 ON THE BALL
Alan Today's technology can give athletes the edge, aid officials and enhance the spectator's experience of the game.

#1207 BENEATH THE SEA
New technologies and pioneering scientists have opened up the farthest reaches of the ocean.

#1208 GAMES MACHINES PLAY
Skilled science students put their ingenious creations to the test while competing for the top prize.

#1209 BODY BUILDING
In the booming new field of bioengineering, remarkable advances are being made in the making and replacing of human body parts.

#1210 A DIFFERENT WAY TO HEAL?
"Alternative" medicines are a growing, multi-billion dollar industry. But do they hold up under scientific scrutiny?