8 P.M. (WNET 13) BUILDING THE GREAT CATHEDRALS Soaring feats of masonry that could be carved from 100 million pounds of stone, Gothic cathedrals, like the Amiens Cathedral in France, right, are marvels of human achievement and artistry. But how did medieval laborers reach such spectacular heights? Requiring the work force of entire towns, the structures often took a century to build, using just hand tools — and, researchers have discovered, hidden formulas drawn from the Bible. “Nova” begins its 38th season by bringing together engineers, architects, art historians and computer scientists to search the aging naves, bays and bell towers of some of these architectural wonders in an effort to save them from catastrophic collapse.
8 P.M. (WNYW FOX 5) GLEE Entering its sophomore season, GLEE is a biting musical comedy that has quickly become a pop-culture phenomenon. The highest-rated new scripted series of the season boasts critical acclaim, a loyal fan base of “GLEEks,” two certified Gold albums, more than 10 million song downloads and an incredible 19 Emmy nominations – earning it the distinction of being the most-nominated series of the year. To top it off, the genre-defying, award-winning series has been picked up through its third season.
8 P.M. (TBS) ALCS BASEBALL After the loss last night to Cliff Lee, the Yankees are down two games to one against the Texas Rangers. Will A.J. Burnett pitch? Well?
9 P.M. (National Geographic) MAKING HISTORY: STONEHENGE Computer-generated effects, scientific research and dramatic re-creations take viewers 4,000 years back in time when, the show speculates, this prehistoric monument in Britain was used as a temple.
9 P.M. (Bio) MAD MEL: THE RISE AND FALL OF A HOLLYWOOD ICON Mel Gibson’s meltdown — including anti-Semitic comments made in 2006 following an arrest for drunken driving and more recent allegations of domestic violence against his former girlfriend Oksana Grigorieva — as explained by psychologists and law enforcement personnel.
9 P.M. (Discovery) DIRTY JOBS In this Season 7 opener, Mike Rowe gets a lesson in animal husbandry when he travels to a ranch in Texas that breeds unusual animal species, like lemurs, sloths and bearcats.
9 P.M. (Bravo) THE MILLIONAIRE MATCHMAKER Patti Stanger relocates to New York City for a fourth season of playing Cupid to the rich and infamous — including the media maven Judith Regan; Freddie Mitchell, a former wide receiver for the Philadelphia Eagles; and Albie and Chris Manzo, the sons of Caroline Manzo of “The Real Housewives of New Jersey” — with the help of a spy camera, a lie detector and a makeup specialist from “Saturday Night Live.” She also learns why some people say it is hard to find love in the city that never sleeps.
10 P.M. (WNET 13) THE PARKING LOT MOVIE In this “Independent Lens” presentation Meghan Eckman visits the Corner Parking Lot in Charlottesville, Va., where students at the University of Virginia ruminate on the meaning of cars and their relationship to capitalism, justice, spiritual awareness and the American dream.