All times eastern.

• 6PM, Science Channel – How It’s Made: Diamond cuttings; wooden doors; paintballs; newspapers.
• 6PM, Discovery Times – American Gangster: The Mob Underground. In the 1930s, unprecedented power comes with the mob’s newfound unity.
• 6PM, Discovery Health – Code Blue: Blink of an Eye. Young man with a severed spinal-cord; injured motorcyclist; toddler’s injury.
• 6PM, Discovery HD – Cheetah: Race Against Time: Wildlife expert Peter Gros and Dr. Laurie Marker of the Cheetah Conservation Fund explore the best way to increase the cheetah population.
• 6:30PM, Science Channel – How It’s Made: Hydrogen cars; carpets; drinking water; laser eye surgery; acoustic guitars.
• 7PM, Versus – The Best and Worst of Tred Barta: Realistic look at hunting and fishing adventures with controversial sportsman Tred Barta.
• 7PM, Discovery Times – The New Detectives: Lethal Obsession. Murderers with obsessions of love, jealousy or power.
• 7PM, Science Channel – Extreme Engineering: Transatlantic Tunnel. Rail travel may yet go intercontinental.
• 7PM, Discovery HD – Planet’s Best: Ultimate Wildlife Encounters: One-on-one experiences with wildlife from around the world.

8PM and on after the jump. Happy Friday the 13th!

• 8PM, Food Network – Good Eats: Corn the Beef. Corned beef.
• 8PM, E! – 20 Most Horrifying Hollywood Murders: Murders of celebrities.
• 8PM, Science Channel – Beyond Invention: Amazing Flying Machines. The work of inventors Kevin Inkster, Paul Moller and Steve Bennett.
• 8PM, Discovery Health – The Critical Hour: Fall Fractures. A hunter injures his back after falling from a tree; multiple injuries from a car collision; a police officer is run over while responding to a call.
• 9PM, Discovery Channel – Man vs. Wild: Ecuador. Bear Grylls demonstrates how to survive in Ecuador’s jungles.
• 9PM, Science Channel – How It’s Made: Electric baseboard heaters; molded pulp containers; video games.
• 9PM, ESPN2 – Boxing: Friday Night Fights. From Tulsa, Okla. Allan Green vs. Darryl Woods.
• 9:30PM, Science Channel – How It’s Made: Car radiators; hatchery chicks; phyllo dough.
• 10PM, PBS (NY 13) – Exposé: America’s Investigative Reports: Vanity Fair investigates Science Applications International Corp., a large government contractor.
• 10PM, Discovery Health – Skeleton Stories: Buried Secrets. Human bones found during home renovation; human skull found in a park.
• 10PM, Discovery HD – Top Ten Coasters 2002: Top wooden and steel roller coasters according to an online survey.
• 10:30PM, DIY – Classic Car Restoration: 1938 Packard: Steering System. The steering system is adjusted.
• 11PM, Cartoon Network – Futurama: Less Than Hero. Fry, Leela and Bender develop superhuman powers and fight crime in the Big Apple.
• 11PM, G4 – Comic-Con 07 Preview: Showcasing the best of previous Comic-Con coverage.
• 11:30PM, Cartoon Network – Family Guy: Screwed the Pooch. Brian releases his sexual energy on the Pewterschmidts’ dog.