<Saturday, April 14
4-5 p.m. E/P

Animal Planet Channel

Subjects: Science and Geography

Elementary, Middle and High School

"Ms. Adventure: Communication"

In this episode of the Ms. Adventure science documentary series host Rachel Reenstra finds out if animals have communication problems, mixed signals and misunderstandings, or do they talk straight? She finds out which creatures are the best and worst communicators..

For series information log on http://animal.discovery.com/fansites/ms-adventure/episode-guide/episode-guide.html

Sunday, April 15
9-11 p.m. E/P

PBS

Subjects: US and World History

Middle and High School

"America at a Crossroads: JIHAD: The Men and Ideas Behind Al Qaeda"

This is the initial episode in a series of eleven documentaries, hosted by journalist Robert MacNeil, exploring the challenges confronting the world post 9/11 - including the war on terrorism; the conflicts in Iraq and Afghanistan; the experience of American troops; the struggle for balance within the Islamic world and Muslim life in America; and perspectives on America's role in the world. This first program provides an in-depth look at modern radical Islamic groups, the ideas and beliefs that inspire them, along with the challenges they pose for governments in the Middle East and the West. From the Muslim Brotherhood in the 1940s to Islamic organizations today, the film offers insightful perspectives of Islam from Western and Middle Eastern journalists, U.S. intelligence experts on the front lines of the fight against Al Qaeda, and friends and contemporaries of Osama bin Laden and his lieutenant Ayman al-Zawahiri. Further films, entitled "Warriors" and "Operation Homecoming: Writing The Wartime Experience," air in this time slot on Monday. Films on Tuesday are "Gangs of Iraq" and "The Case for War: In Defense of Freedom". Wednesday's episodes are "Europe???s 9/11" and "The Muslim Americans." Thursday's are "Faith Without Fear" and "Struggle for the Soul of Islam: Inside Indonesia". Friday the final episodes are "Security Versus Liberty: The Other War" and "The Brotherhood". All programs rated TV-PG

Series Web site with further details, program dates and times: http://www.pbs.org/weta/crossroads

Monday, April 16
5-6 p.m. E/P

Animal Planet Channel

Subjects: Science

Elementary, Middle and High School

"The Jeff Corwin Experience: Galapagos: The Living Laboratory"

In this documentary the host follows the evolutionary footsteps of Charles Darwin in the archipelago known as Galapagos, where he encounters marine and land iguanas, giant tortoise, as well as a whole new species that has evolved since Darwin's time. TV-G

Tuesday, April 17
8-9 p.m. E/P

PBS

Subjects: Science

Elementary, Middle and High School

"NOVA: First Flower"

This documentary investigates the discovery of an ancient fossil of a plant that some leading scientists now believe to be the earliest evidence of a flower. The program probes the controversy sparked by this unique fossil found in a remote area of China where dinosaurs roamed more than 100 million years ago. Does this discovery hold the key to one of science's deepest mysteries? The detective work behind the hunt for the very first flower and the still unfolding story of how and why flowers evolved. Flowers hold a special place in the plant world, as they do in the human heart. There are between 220,000 to more than 400,000 different flowering species on earth. They dominate gardens and landscapes and provide many food staples. Yet until recently, almost nothing was known about their origin; Charles Darwin called it "an abominable mystery." TV-G

Log on: pbs.org/nova/flower

Tuesday, April 17
9-10p.m. ET, 7-8 p.m. PT

National Geographic Channel

Subjects: US History

Middle and High School

"The Hunt For Lincoln's Assassin"

The setting: Washington, D.C, April 14, 1865. As the nation celebrates the end of the Civil War, an angry man strikes a final blow for the south. John Wilkes Booth shoots President Abraham Lincoln in front of a thousand horrified onlookers and simply disappears into the night. For almost two weeks following, he is able to elude thousands of searchers in one of the largest manhunts in United States history. This documentary examines one of the struggling nation's darkest hours by investigating Booth's daring escape attempt in The Hunt for Lincoln's Assassin.

Wednesday, April 18
8-9 p.m. E/P

Animal Planet Channel

Subjects: Science

Elementary, Middle and High School

"The Ultimate Guide, Whales"

Whales are the largest creatures that ever lived and yet exquisitely graceful. Viewers of this documentary will learn about whales' past, their successes and failures, and see comparisons of size and speed via cutting-edge computer animation. TV-G

Wednesday, April 18
8-9 p.m. E/P

History Channel

Subjects: Science

Elementary, Middle and High School

"Modern Marvels: Horsepower"

This is a documentary about "extreme" extreme horsepower ??? and energy efficiency. Experience the fastest accelerating cars on earth. Find out how horsepower was first coined as a marketing tool for the steam engine in the early 1800s and meet the horsepower police--the Society of Automotive Engineers who test today's most powerful car engines. Feel the amazing power of Unlimited Hydroplane racing as 3-ton boat-beasts careen across water at speeds of over 200 miles per hour. Journey to the bowels of an enormous container ship where the world's most powerful diesel engine provides over 100,000 horsepower. At the Hoover Dam, watch as it harnesses the enormous power of water. Explore the 80,000 horsepower pumping units at the Edmonston Pumping Plant that delivers 2-billion gallons of water a day to thirsty Californians. And sit behind the steering wheel of a new generation of hybrid cars that boast 400-horsepower yet get 42 miles per gallon of gas. Rating: TV-PG

Thursday, April 19
8-9 p.m. E/P

National Geographic Channel

Subjects: Science and Geography

Middle and High School

"Impossible Islands"

An enormous project is underway in the Arabian Gulf that will literally change the face of the coastline. It's so vast it can be seen from space. The world's largest artificial islands are being constructed and fashioned in the shape of a massive palm tree. This project is part of an even bigger plan to transform Dubai into one of the world's premiere tourist destinations. This documentary shows what it takes to build this massive and ambitious engineering feat.

Friday, April 20
9-11 p.m. E/P

PBS

Subjects: US and World History

Middle and High School

"AMERICA AT A CROSSROADS: Security Versus Liberty: The Other War - The Brotherhood"

This is a broadcast of the final two episodes in a documentary series about the challenges confronting the post-9/11 world. Host is journalist Robert MacNeil. "Security Versus Liberty: The Other War" describes how, following 9/11, the U.S. government adopted some controversial new policies to help prevent terrorism at home, including eavesdropping on Americans' phone calls, secret demands for records under the Patriot Act and the use of FBI sting operations. The Bush administration contends that these tactics have helped save American lives, but critics say they have taken a toll on our liberties. The film explores this urgent national debate by talking with both critics and advocates of the new policies and telling the compelling real-life stories of people whose lives have been directly affected. "The Brotherhood" is about The Muslim Brotherhood, an organization dedicated to the spread of a fundamental form of Islam throughout the world - but is it also supporting terrorists? Award-winning Newsweek journalists Mark Hosenball and Michael Isikoff investigate a movement that preaches peaceful co-existence, while offering inspiration for jihadi groups. They meet a top Brotherhood leader condemned by President Bush for financing al Qaeda and Hamas, a sympathizer living freely in Germany though believed to have played a significant role in 9/11 and a Brotherhood supporter who met with U.S. presidents while plotting an assassination. Programs rated TV-PG

Series website: http://www.pbs.org/weta/crossroads

Saturday, April 21
8-10 p.m. E/P

Discovery Channel

Subjects: Science

Elementary, Middle and High School

"Earth 2100: Wild Weather Ahead - Green: The New, Red, White and Blue"

Airing on the eve of Earth Day, these two documentaries present some of the latest news about the environment. The first, entitled "Earth 2100: Wild Weather Ahead" looks at the future of planet Earth and tells that story, through graphics, animation, dramatic footage and first hand accounts of a world in environmental crisis. In the second program, "Green: The New, Red, White and Blue" New York Times columnist Thomas Friedman travels the globe to unravel the tangled web of where we get our energy, and what we can do about the carbon footprint producing and consuming that energy. He visits the front lines of a revolution taking shape. Both programs TV-PG

Saturday, April 21
10-11 p.m. E/P

History Channel

Subjects: Geography and History

Elementary, Middle and High School

"THE STATES: California, North Carolina, Kansas, New Hampshire and West Virginia"

This is the initial episode of a new 10-part series "THE STATES", which presents a portrait of America by detailing the unique history and character of five states in each episode. The viewer will discover, for each state, the true stories of famous legends, little-known facts, colorful local characters and celebrities, and a history rich in details. State-of-the-art graphics, including 3-D topographical maps, present a never-before-seen tour of each state. In California, see how the discovery of gold at Sutter's Mill, in 1848 started the largest migration in US history, and then learn how scientists are currently trying to predict the next big earthquake. Next it's off to North Carolina's tobacco fields and the mystery of Roanoke--the lost colony. Wichita, Kansas is the "Aviation Capital of America" and Wyatt Earp put Dodge City on the map. New Hampshire is the state where the first act of open rebellion in America's Revolutionary War took place and the first presidential primary each election season is held. Finally, learn about The Battle of Blair Mountain, West Virginia, where in 1921, over 10,000 unionizing coal miners faced off with state and federal troops in what was one of the largest armed uprisings in America since the Civil War.

Series site: http://www.history.com/minisite.do?mini_id=53924