7:00 PM Nature – “Echo: An Elephant To Remember”
Echo, the elephant matriarch, was the subject of many NATURE films and the leader of a carefully studied herd of elephants in Africa. Last year, she died of natural causes. This film is a look back at this remarkable animal through extraordinary footage and interviews with the researchers that cared for and studied this amazing herd.

8:00 PM NOVA – “Japan’s Killer Quake”
In its worst crisis since World War II, Japan faces disaster on an epic scale: a rising death toll in the tens of thousands, massive destruction of homes and businesses, shortages of water and power, and the specter of nuclear reactor meltdowns. The facts and figures are astonishing. The March 11th earthquake was the world’s fourth largest earthquake since record keeping began in 1900 and the worst ever to shake Japan. The seismic shock wave released over 4,000 times the energy of the largest nuclear test ever conducted; it shifted the earth’s axis by 6 inches and shortened the day by a few millionths of a second. The tsunami slammed Japan’s coast with 30 feet-high waves that traveled 6 miles inland, obliterating entire towns in a matter of minutes. JAPAN’S KILLER QUAKE combines authoritative on-the-spot reporting, personal stories of tragedy and survival, compelling eyewitness videos, explanatory graphics and exclusive helicopter footage for a unique look at the science behind the catastrophe.

9:00 PM Secrets Of The Dead – “Japanese Supersub”
Spring, 1946. Ten months after the end of World War II, an explosion rocked the Pacific off the coast of Hawaii. America had just destroyed one of Japan’s most advanced weapons systems. But this was no belated attack against the defeated Japanese. Rather, it was an attempt to keep an advanced, top-secret submarine out of the hands of the Russians. What was this sub and where had it come from? Secrets of the Dead: Japanese SuperSub investigates, revealing the startling story of Japan’s successful creation of a technological masterpiece-an aircraft carrier submarine that could blow up the Panama Canal, reach the U.S. main land undetected, and unleash panic-inducing air attacks on American civilians. How close did Japan’s secret sub come to attacking America? And how did America’s own top-secret super-weapon put an end to the Japanese threat?