All times Eastern.

• 6PM, History Channel - Modern Marvels: Doomsday Tech 1. Potential for accidental nuclear-weapons launch; global warming; futuristic threats.
• 6PM, Sundance - Live From Abbey Road: Iron Maiden, Gipsy Kings & Natasha Bedingfield
• 6PM, G4 - Ninja Warrior: Sasuke 11: Part 3
• 6PM, Military Channel - Anatomy of a Supercarrier: The crews of aircraft carriers and the arsenals they carry.
• 6:30PM, G4 - Ninja Warrior: Sasuke 11: St.2/3
• 7PM, Discovery Health - Impact: Stories of Survival: Motocross Mess. A motocross jump comes up short; a hiker goes over a waterfall; a baseball accident reveals a deadly condition; a cashier is attacked during a robbery.
• 7PM, Speed - Chop Cut Rebuild: Engine Day. The Ford’s motor assembly begins; joining the Camaro’s syb-frame to the body.
• 7PM, Discovery Channel - Really Big Things: Giant Tree Spade. A North Carolina tire re-treader; a hydroelectric plant in Washington; a giant tree-spade.
• 7PM, National Geographic - Vegas Mafia: Cleaning up the mob-built gambling mecca.
• 8PM, History Channel - Comets: Prophets of Doom: Mysteries surround comets; predicting the future; the creation of the universe.
• 8PM, PBS (NY 13) - Nova: NOVA scienceNOW. Scientists work on a pill that could extend the human life span; space elevators; satellite imaging helps uncover 2,000-year-old Mayan ruins.
• 8PM, Food Network - Good Eats: Milk Made. Alton dissects milk.
• 8PM, Military Channel - Superweapons of the Ancient World: The City Destroyer. The fourth century sees the creation of a mobile armor-plated siege tower armed with catapults.
• 8PM, Science Channel - Starship Orion: The Future of Space Travel: NASA develops a new crew exploration vehicle to transport space travelers to the moon and Mars.

9PM and on after the jump!

• 9PM, History Channel - The Universe: The Inner Planets: Mercury & Venus. The sun scorches its nearest planets, Mercury and Venus.
• 9PM, Discovery Channel - Dirty Jobs: Leather Tanner. Mike helps tan leather at a New York tannery.
• 9PM, Sundance - It’s Not Easy Being Green: The Strawbridge family moves into a 300-year-old farmhouse; the family builds an aqueduct to get water to the water wheel.
• 9PM, Science Channel - From the Earth to the Moon: Galileo Was Right. Lunar geologists prepare the crews for exploration.
• 10PM, Fuse - Pants Off Dance Off: Shedding their clothes down to their skivvies while dancing to popular music videos gives some the chance to win bragging rights and cash.
• 10PM, Military Channel - Weaponology: Body Armor. The history of armor protection, from the suits worn by medieval knights to the latest high-tech apparel.
• 10PM, Science Channel - Space Station and Beyond: Space station experience.
• 11PM, History Channel - Modern Marvels: Truck Stops. The world’s largest truck-stops.
• 11PM, Comedy Central - Daily Show: Christopher Walken, actor promoting “Hairspray”
• 11PM, Discovery HD - Roush Racing: Driver X: Lady in Black. The 12 remaining drivers start competing at Darlington Raceway.
• 11:30PM, Comedy Central - Colbert Report: National Geographic Photographer Mark W. Moffett