All times Eastern.

• 6PM, Discovery Channel – How It’s Made: Countertop laminate; frozen treats; children’s building blocks; detergents.
• 6PM, History Channel – Modern Marvels: Doomsday Tech 1. Part 1 of a two-part examination of current and proposed technology that could potentially lead to the destruction of civilization and Earth. Included: nuclear power; hydrocarbon-based-energy technology; and nanotechnology.
• 6PM, Travel Channel -When Beaches Attack: Cameras visit and explore some of the world’s most dangerous beaches and reveal the hidden threats that beach-goers face while they are trying to relax on the warm sands and frolic in the salty ocean, including a look at sharks and tsunamis.
• 6PM, Fuse – The Sauce: A magazine program that features music news, lifestyle information and celebrity guests.
• 6:30PM, Discovery Channel – How It’s Made: Included: electric-guitar amplifiers; marbles; footballs; airplane propellers.
• 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, Discovery HD – Unfolding Universe: Astronomers and researchers attempt to locate a mysterious presence deep in the heart of the galaxy, where clues to the origin of the universe may lie.
• 7PM, Discovery Health – Impact: Stories of Survival: Photographer Electrocuted. A shark attack in a remote area of the South Pacific. Also: a man has a metal blade lodged in his throat; a cameraman accidentally touches a 15,000-volt power line.
• 7PM, Science Channel – Cool Fuel: Geothermal and Bio-diesel. Shaun travels from San Francisco to the Oregon border in an electric vehicle. Also: Ed Begley Jr.’s solar-powered home.
• 7PM, Weather Channel – Storm Stories: Chasing Danger. Mississippi State University students on a storm-chasing trip encounter an F-2 tornado.
• 7PM, Food Network – Good Eats: Major Pepper. A look at pepper is featured. Included: a search for the perfect pepper mill; the properties of pepper’s essential oils.
• 8PM, Discovery Channel – Human Prey II: Encounters with dangerous animals include an Australian kayaker who tangles with a huge salt-water crocodile and a cyclist in Vancouver who survives a cougar attack.
• 8PM, National Geographic – Need for Speed: Boats. Debut: An examination of high-speed vehicles. First up: Spotlighting some of the world’s fastest boats and the science and engineering behind them.
• 8PM, Science Channel – The Planets: Different Worlds. Examining the origins of the planets in our solar system, and how distance, time and technology handicap efforts.
• 8PM, Discovery Times – New Detectives: Undaunted. An office party in Southern California takes a violent turn, with conflicting accounts offered as to what really happened.
• 8:30PM, Fuel – Weekly Update: A look at the world of action sports, including news, highlights and interviews with athletes.
• 8:30PM, NBC – The Office: Beach Games. When Michael is considered for a corporate position, he squires his staffers to Lake Scranton, where he puts them through challenges on the beach à la “Survivor” to name his replacement at Dunder-Mifflin.
• 9PM, Discovery HD – Borneo’s Pygmy Elephants: Documentary about a conservation campaign aimed at the little-known pygmy elephants of Borneo.
• 9PM, Travel Channel -1000 Places to See Before You Die: Peru.
• 9PM, Discovery Channel – Killer Ants: Examining some of the 8000 species of ants that cover the planet, including fearsome African driver ants and voracious army ants of South and Central America.
• 9PM, Science Channel – Roving Mars: Two roving space robots explore Mars in this IMAX documentary.
• 9:30PM, Speed – American Muscle Car: The Last Sting Ray: Picking Up Speed. Examining the Corvette’s breakthrough and the work of engineer Zora Arkus-Duntov.
• 9:30PM, Fuel – AKA: Girl Surfer: Following the personal and professional lives of six female surfers, including Melanie Bartels, Rochelle Ballard, Rebecca Woods and Layne Beachley.
• 10PM, Showtime – Penn & Teller: Bullshit!: Mount Rushmore. The guys are between a rock and a hard face when they check out Mount Rushmore.
• 10PM, Discovery HD – Equator: Power of an Ocean. The Galapagos Islands and Palmyra Atoll, and how ocean currents set in motion by the force of the equatorial sun affect the fauna and flora of both.
• 10PM, PBS – Globe Trekker: Cambodia. A visit to Cambodia includes a stop at Kampot, a celebration of Buddha Day in Phnom Da, a visit to the island of Koh Rong, and a stop at the Angkor Wat temple.
• 10PM, History Channel – Modern Marvels: Pacific Coast Highway. The history of the Pacific Coast Highway, which runs from California to Washington, includes comments by historians and engineers; and examines the technology that maintains the road through floods, earthquakes and landslides.
• 11PM, Comedy Central – Daily Show: Writer Reza Aslan.
• 11PM, History Channel – Death Road: Bolivia’s infamous “Death Road,” often called the most dangerous road in the world, is explored. Marsh Mokhtari hosts.
• 11:30PM, Comedy Central – Colbert Report: Magazine editor Jann Wenner.