All times Eastern.

• 6PM, Discovery Channel - How It’s Made: Engine blocks; jawbreakers; drum shells; drums.
• 6PM, National Geographic - Ultimate Factories: Apache Helicopter. The evolution and building process of a lethal attack helicopter.
• 6PM, Science Channel - Raging Planet: Earthquake. The friction of tectonic plates, earthquakes can raise mountains and flatten cities.
• 6PM, Military Channel - Top Ten Submarines: Innovative submarines of the last 100 years.
• 6:30PM, Discovery Channel - How It’s Made: Plastic bottles and jars, mail, eggs, handcrafted wood pens.
• 7PM, History Channel - Modern Marvels: Airships. The crash of the Hindenburg puts an end to the era of zeppelins.
• 7PM, Food Network - Good Eats: Squid Pro Quo 2. Calamari.
• 7PM, TLC - Overhaulin’: Hot for Teacher. The team works on a 1964 Chevy Malibu for a woman who was voted “Hottest Teacher” by her high-school students.
• 7PM, Discovery Health - Impact: Stories of Survival: Speared by Marlin. Marlin spears woman through the chest; luge crash; rock climbing accident; close-range shotgun blast.
• 7PM, Discovery HD - Predators of the Great Barrier Reef: The crown of thorns starfish are consuming the Great Barrier Reef.

8PM and on after the jump!

• 8PM, PBS (NY 21) - Nova: Bone Diggers. Unknown kangaroo species and the first complete skeleton of the largest carnivorous marsupial ever found are recovered from Australia’s Nullarbor Plain.
• 8PM, National Geographic - Amazing Planet: Destructive Forces. Earth’s geologic evolution; the formation of the first continent.
• 8PM, Military Channel - Tank Overhaul: The Panther. Jacques Littlefield’s team works to restore a severely damaged Panther tank pulled from the bottom of a river in Poland.
• 8PM, G4 - X-Play: “Silent Hunter: Wolves of the Pacific”; “Full Auto 2: Battlelines”; “The Dream of the Turtle.”
• 9PM, History Channel - Roman Vice: Roman funeral practices; secret societies; palaces of Nero and Tiberius.
• 9PM, National Geographic - Amazing Planet: Ocean Realm. How the oceans formed; why they have not evaporated.
• 9PM, Discovery HD - Rogue Nature: Squid. The Humboldt squid.
• 9:30PM, Speed - American Muscle Car: The Ultras. People take the fastest car they can find and make it even faster.
• 10PM, National Geographic - Amazing Planet: Born of Fire. Lava and magma play large parts in the constant reshaping of the earth.
• 10PM, Travel Channel - 1,000 Places to See Before You Die: Canada. The Ulles make their final stop in Canada.
• 10PM, G4 - G4’s Free Stuff: Reviewing gadgets, games, music, movies and books while viewers are rewarded on the air.
• 10PM, Speed - MotorWeek: Drivers’ Choice Awards. The best cars, trucks, SUVs and minivan of the year; routine car care; cars for the needy; Buick Enclave and Subaru Tribeca.
• 10PM, Discovery HD - Secrets of the Sun: Scientific history of the sun.
• 10:30PM, Food Network - Ace of Cakes: Hell Week. Duff and the staff have a bad week.
• 11PM, SpikeTV - The Ultimate Fighter: The last semi-final match takes place to determine who will move on to fight in the live finale.
• 11PM, History Channel - Decoding the Past: The Search for Noah’s Ark. Explorers search Mount Ararat and other targeted sites for the resting place of Noah’s Ark.
• 11PM, Comedy Central - Daily Show: Greg Bear, science fiction writer
• 11:30PM, Comedy Central - Colbert Report: Vincent Bugliosi, author of Reclaiming History: The Assassination Of President John F. Kennedy