All times Eastern.

• 6PM, G4 - Ninja Warrior: Sasuke 3: Part 3 (30 min)
• 6PM, Science Channel - Unfolding Universe: Astronomers and scientists study a strange presence hidden in the core of the galaxy. (60 min)
• 6PM, Showtime - Aeon Flux (movie): In the last city on Earth, underground rebels dispatch their top assassin to kill a government leader. Based on the TV series.
• 6PM, Discovery HD - Anatomy of an FA-18: The capabilities of the carrier-based strike fighter and the training necessary to pilot the aircraft come under examination. (60 min)
• 6:30PM, G4 - Ninja Warrior: Sasuke 4: Part 1 (30 min)
• 6:30PM, ESPN - SportsCenter Fantasy Draft Special (sports): (90 min)
• 7PM, Science Channel - How Do They Do It?: Blasting a shuttle into space; the world’s twistiest roller-coaster; turning rock into a pool table. (30 min)
• 7PM, History Channel - Modern Marvels: The Arch. The arch is one of the strongest and most versatile structures made by humans. (60 min)
• 7PM, Discovery Health - Impact: Stories of Survival: Avalanche. A motorbike accident fractures a man’s skull; a surgeon’s hands are caught in a table-saw; a man caught in an avalanche gets a broken leg. (60 min)
• 7PM, Versus - World Combat League (”sports”): Playoffs. WCL Playoffs from Miami. (60 min)
• 7:30PM, CMTV - Ty Murray’s Celebrity Bull Riding Challenge: Ty and PBR champion Justin McBride teach the celebrities how to mount a bull in the chute and how to take a fall; the celebrities take their first rides. (30 min)

8PM and on after the jump!

• 8PM, PBS (NY 13) - Nova: Origins: How Life Began. Primitive organisms convert carbon dioxide into oxygen. (60 min)
• 8PM, History Channel - Modern Marvels: Cheese. The ancient techniques, cutting-edge technologies and history of cheese. (60 min)
• 8PM, Fuse - The Texas Chainsaw Massacre (movie): Young adults encounter a houseful of demented butchers who chase them with chain saws and other deadly tools. (120 min)
• 8PM, ESPN - 2007 World Series of Poker (sports?): Main event, from Las Vegas. (60 min)
• 8PM, G4 - X-Play: “Fantastic Four: Rise of the Silver Surfer,” “The Sims 2: Pets,” “Prince of Persia Classic” and “Tenchu Z.” (30 min)
• 9PM, History Channel - The Universe: The Most Dangerous Place in the Universe. Cosmic hot zones. (60 min)
• 9PM, Discovery Channel - Dirty Jobs: Alligator Egg Collector. Mike forages the swamps of Louisiana in search of alligator eggs. (60 min)
• 9PM, Sundance - It’s Not Easy Being Green: The Strawbridges install their first wind turbine to pump water from a spring. (35 min)
• 9PM, Science Channel - Eco- Tech: Zero Waste. Exploring new innovations in waste and recycling technology. (60 min)
• 9PM, Speed - Motorcycle Racing (sports): AMA Motocross - Millville
• 10PM, Discovery Channel - Build It Bigger: Fault Zone Tunnel. Miners work to dig two huge tunnels to supply fresh water to Southern California. (60 min)
• 10PM, Military Channel - Weaponology: Bomber. Tracing the history of bombers, from early aircraft to the bunker-busters of today. (60 min)
• 10PM, CMTV - O Brother, Where Art Thou? (movie): A mysterious lawman tracks three escaped convicts searching for buried treasure in 1930s Mississippi. Based in part on Homer’s “The Odyssey.” (150 min)
• 11PM, Comedy Central - The Daily Show With Jon Stewart: “Operation Silent Thunder: The Daily Show in Iraq.” (30 min)
• 11PM, Science Channel - Survivorman: Artic. Les endures a chilly week on the northern reaches of Baffin Island. (60 min)
• 11PM, National Geographic - National Geographic’s Most Astounding Moments: Surviving disaster; filming a volcano’s bubbling lake; saving animals in the nick of time; extreme weather. (60 min)
• 11:30PM, Comedy Central - The Colbert Report: Michael Shermer of the Skeptics Society