Viewers who can’t wait for the fireworks can watch “Greatest Patriotic Songs” (9 p.m., Saturday, CMT), an appreciation of flag-waving martial anthems from the time of the Civil War to the more recent war in Iraq. Interviews include Gen. Norman Schwarzkopf, Trace Adkins, Aaron Tippin, actor Rick Schroder and combat veterans who share their feelings about their favorite ballads.

¢ Unusual designs, oddball homes, quirky collections and unorthodox sculpture gardens are showcased on “Offbeat America” (5 p.m., Sunday, HGTV). Al Johnstone’s wife liked sunsets so much he set out to build a house that let her see them from every room and every angle. In fact, when he finished, there were no angles at all.

A man with an inexhaustibly inventive mind (and a bottomless bank account to boot), Johnstone built a round, rotating house on a California hillside. Every room features “walls” that are actually 7-foot windows, so the view is never obstructed.

Other “Offbeat” offerings include a Miami apartment decorated entirely with inflatable objects, such as old air mattresses and rubber boats. A retired Colorado farmer turned his idle acreage into a “zoo” for his peculiar menagerie of dragons, insects and unearthly monsters crafted out of spare tractor parts, car chassis and industrial ephemera.

Saturday’s highlights

¢ NASCAR Racing (6 p.m., NBC) live from Daytona, Fla.

¢ Spend eight straight hours with terrifying bugs, scary birds and other shocking critters on the “Weird, Bad & Ugly” (7 p.m., Animal Planet) marathon.

¢ Scheduled on “48 Hours Mystery” (7 p.m., CBS): a woman seeking custody of her children goes undercover to expose a corrupt judge.

¢ Scheduled on “48 Hours Mystery” (9 p.m., CBS): A child kills a child.

Sunday’s highlights

¢ Scheduled on “60 Minutes” (6 p.m., CBS): soldiers as old as 50 asked to return to combat; the space race gets privatized.

¢ Scheduled on “Dateline” (6 p.m., NBC): a Phoenix arsonist targets posh homes.

¢ Jeff Goldblum and Julianne Moore star in the 1997 fantasy sequel “The Lost World: Jurassic Park 2” (6 p.m., Fox).

¢ A victim of gang violence gets a new house on “Extreme Makeover: Home Edition” (7 p.m., ABC).

¢ Jackie Chan, Owen Wilson and Lucy Liu star in the 2000 martial-arts/Western comedy “Shanghai Noon” (8 p.m., CBS).