All times Eastern.

• 6PM, Discovery Channel - How It’s Made: Springs; pavers; pianos.
• 6PM, History Channel - Man, Moment, Machine: Al Capone & the Machine Gun Massacre. The 1929 St. Valentine’s Day Massacre, orchestrated by Al Capone and executed with the use of the Thompson submachine gun, is recalled. Host: Hunter Ellis.
• 6PM, Science Channel - Survivorman: Plane Crash. Les is stranded in snowy northern Ontario, next to a crashed plane. For a week, he must survive with only an axe, a multi-tool and a blanket.
• 6PM, Discovery Health - Critical Incident: Priority One. Medevac teams in helicopters fly in a woman in cardiac arrest caused by multiple gunshot wounds, a man crushed by an SUV and an attempted suicide.
• 6:30PM, Discovery Channel - How It’s Made: Wind generators; PVC gloves; thermo-formed glass; fire trucks.
• 6:30PM, HGTV - Rezoned: An 1890 Woolworth building; a 1957 pinball arcade; an 1883 grocery warehouse; an 1895 methanol tank.
• 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, Food network - Good Eats: House of the Rising Bun. Breakfast breads are prepared. Also: a segment on cinnamon.
• 7PM, Discovery Health - Impact: Stories of Survival: Motorcross Mess. A motocross daredevil accident. Also: a hiker is swept over a waterfall; a baseball accident reveals a deadly condition; a cashier is beaten in a robbery.
• 7PM, PBS (NY 21) - BBC World News: International news from the British Broadcasting Corporation.
• 7PM, Discovery Channel - How It’s Made: Featured: halogen bulbs; cellulose insulation; aluminum ladders; bamboo fly rods.
• 8PM, PBS (NY 21) - Wild Chronicles: A Monterey Bay Aquarium research project on great white shark behavior; life on Juan Fernandez Islands (off the coast of Chile), including a mother fur seal searching for food to feed its newborn pup.
• 8PM, Discovery Channel - Hazard Pay: Horse Jockey. Curt Doussett attempts to be a jockey (at 220 pounds), and works as a logger, wielding a chain saw and dodging falling trees.
• 8PM, National Geographic Channel - Explorer: Secrets of the Tornado. Tornados are analyzed using the world’s largest tornado simulator, and actual footage of twisters, including one that hit downtown Dallas.
• 8PM, History Channel - Modern Marvels: Freight Trains. A history of freight trains includes a tour of the Union Pacific Railroad’s Bailey Yard in Nebraska.
• 9PM, PBS (NY 13) - Secret Files of the Inquisition: The War on Ideas. Part 3 of 4. Martin Luther’s revolt against the Roman Catholic Church helps spark the Inquisition; the impact of religious persecution on the Renaissance.
• 9PM, National Geographic Channel - Seconds from Disaster: Asian Tsunami. Recalling the Dec. 26, 2004, South Asian tsunami, which ultimately killed more than 200,000 people and entire communities were destroyed after a massive earthquake in the Indian Ocean set off the tidal wave.
• 9PM, Discovery Times - Most Evil: Psychotic Killers. Examining psychotic killers, including Ed Gein, Arthur Shawcross and Gary Heidnik, who engaged in atrocities including torture and cannabalsim. Host: Michael Stone.
• 9PM, Discovery HD - Accident Investigator: Mystery Driver. A college student is found in a field after a head-on crash into a tree; an elderly driver is distraught after learning he killed a young woman; an investigator is suspicious of a young driver’s version of events in a fatal crash.
• 10PM, ABC - Lost: Greatest Hits. While Jack devises a plan to do away with the Others once and for all, Sayid uncovers a flaw in the Others’ system that could lead to everyone’s rescue. But it means that Charlie must take on a dangerous task.
• 10PM, Discovery Channel - MythBusters: Salsa Escape. An investigation to discover if it is possible to break out of a jail using salsa. Also: massive amounts of high explosive are used to break up a cement truck filled with hardened cement.
• 10PM, TLC - Mystery Diagnosis: The Man With Rocks in his Chest. A man in his late 30s experiences a constant, painful burning sensation in his chest, making breathing difficult, but an initial trip to the ER reveals nothing.
• 10PM, Discovery Times - Decoding Disaster: Bridges. The collapse of the Oakland Bay Bridge during the October 1989 earthquake is examined. Also: a bridge collapse caused by a barge in Oklahoma.
• 11PM, Comedy Central - Daily Show: Don Rickles.
• 11PM, Discovery Channel - Dirty Jobs: Dirtiest Water Jobs. Dirty water jobs include crabber, growing green algae, shrimper, logger and catfish noodler.
• 11:30PM, Comedy Central - Colbert Report: DNC Chairman Howard Dean.