All times Eastern.

• 6PM, Discovery Channel - How It’s Made: Included: amphibious vehicles; putters; model ships; wax crayons.
• 6PM, History Channel - Modern Marvels: More Bond Gadgets. A look at “Bond gadgets” includes footage taken on the set of “Thunderball.”
• 6PM, National Geographic - Hunter and Hunted: Mangrove Man-Eater. Documenting Bengal-tiger attacks on people in India’s Sundarbans, a swampy island cluster near the border with Bangladesh.
• 6PM, Science Channel - Valley of the T-Rex: An overview of paleontological research into Tyrannosaurus Rex includes recent fossil finds in Montana. Also: new evidence that questions conventional theories about T-Rex behavior.
• 6:30PM, Discovery Channel - How It’s Made: Yogurt; candles; neon signs; bookbindings.
• 6:30PM, G4 - Ninja Warrior: Human physical ability is tested in each episode, as 100 competitors push their limits through a physically demanding four-stage course.

7PM and on after the jump!

• 7PM, PBS - BBC World News: International news from the British Broadcasting Corporation.
• 7PM, Food Network - Good Eats: Field of Greens. Recipes featuring leafy greens are prepared.
• 7PM, Speed - Chop Cut Rebuild: Body Work. The hot rod gets some paint; Rich attacks the Chevy’s firewall.
• 7PM, Discovery Health - Impact: Stories of Survival: Cyclist Run Over. A motorcycle stunt jump nearly severs a man’s leg; an athlete is run over by a camera car during a triathlon; a skier jumps face-first into a tree; and a car crash drives a metal ladder into a man’s face.
• 7PM, National Geographic - Crash Science: Motorcycles. The high-risk world of professional motorcycle racing is examined along with its inherent danger of high-speed collisions.
• 8PM, LWOR - International Fight League’s Total Impact: A look at International Fight League athletes features in-ring action and visits to fighters’ homes, locker rooms and training sessions.
• 8PM, Science Channel - Neanderthal: The Rebirth: A study of Neanderthals compares them to modern humans and examines differences.
• 8PM, Military Channel - 20th Century Battlefields: 1968 Vietnam. Peter Snow, a former BBC defense and diplomatic correspondent, goes back to Vietnam to examine the Tet offensive.
• 8PM, Discovery HD - Risk Takers: Polar Bear Alert Specialists. Following the Manitoba Polar Bear Alert Team as it patrols the town of Churchill, Canada, checking the threat of polar bears.
• 8:30PM, Fuel - Weekly Update: A look at the world of action sports, including news, highlights and interviews with athletes.
• 9PM, NBC - Heroes: String Theory. Hiro encounters a grim future for those with abilities: they are hunted, jailed and killed for being threats to society. He attempts to return to his own time, but is caught up in a battle that involves a host of new and oddly familiar faces. (I know, I said no network tv on here. But Heroes is so stinkin’ great!)
• 9PM, Discovery Channel - Oil, Sweat and Rigs: Diamond. A drilling team 120 miles out in the Gulf of Mexico tries to unblock an old well, and they only have two weeks to accomplish it.
• 9PM, Discovery Health - Medical Incredible: Extreme Amnesia. A man experiences severe brain damage from the common herpes simplex virus, leaving him with a short-term memory of seven seconds and no recollection of anything moments earlier.
• 9PM, History Channel - Cities of the Underworld: Hitler’s Underground Lair. Berlin is explored, focusing on ruins of Nazi Germany, including a network of underground bunkers.
• 10PM, Food Network - Diners, Drive-Ins and Dives: That’s Italian. Searching for great Italian food in unexpected places. Included: stromboli in a Las Vegas strip mall; a Tennessee drive-in where pasta is brought to your car; a Texas diner serving Italian sausage and peppers.
• 10PM, Travel Channel - Anthony Bourdain: No Reservations: Malaysia (Into the Jungle)
• 10PM, Science Channel - Iceman: Hunt for a Killer: Ötzi, the 5300-year-old ice mummy unearthed in the Alps in September 1991, is scheduled for another autopsy, this time to remove an arrowhead from his back to see if his killer’s identity can be deduced.
• 10PM, FX - The Riches: X Spots the Mark. Hugh discovers the missing money from the safe and suspects everybody, Wayne included. So Wayne, thinking fast to explain his whereabouts on the night of the crime, comes up with a story about a mystery Panco investor.
• 11PM, Comedy Central - Daily Show: Writer Christopher Hitchens.
• 11PM, HGTV - World’s Most Extreme Homes: An actor’s home has a 2-ton statue of Charlie Chaplin holding up the roof; a home decorated with a luxurious Alpine-chalet theme; a house on a floating platform that has a glass-bottomed sitting room.
• 11PM, History Channel - Mega Movers: Perils in Paradise. A plantation house in Hawaii is moved to a location near an active volcano; and a pre-Civil War farmhouse in North Carolina is relocated.
• 11:30PM, Comedy Central - Colbert Report: Astrophysicist Neil deGrasse Tyson; former senator Bill Bradley.