TONIGHT'S MUST-SEES

"So You Think You Can Dance," 7 p.m., Fox. This show keeps getting better. Great choreography merges with gifted individuals — and some impressive duos. Watch the link between Joshua Allen, 19, a beefy Texan, and Katee Taira Shean, 20, a Californian. Catch Kherington Payne, 18, a California blonde, and Will Wingfield, 21, a Debbie Allen protege from Nashville. Eventually, they'll have to compete with each other. For now, they're magical together.

"Nova scienceNOW," 9 p.m., PBS. How much can science do? Can it determine which Van Gogh painting is a fake? Predict our health future via DNA? Create an artificial tree, pulling carbon dioxide from the air? We see fascinating efforts at all three. We also get a profile of Pardis Sabeti. An Iranian native, she survived tough times to become a rising geneticist — and a part-time rock star.

OF NOTE

"Happy Feet" (2006, 3:30 p.m.) and "Harry Potter and the Order of the Phoenix" (2007, 5:30 p.m.), HBO. This is a good time for family viewing. Here are two choices, one animated and one epic.

"Criminal Minds," 8 p.m., CBS. Young black women are being killed in a mostly white suburb. The team scrambles to find the killer.

"Pulp Fiction" (1994), 9 p.m. VH1. Here's a fresh chance to see Quentin Tarantino's classic — harsh, nasty but altogether brilliant.

"CSI:NY," 9 p.m., CBS. Police try to find a connection between murders that are two buildings apart.

"Celebrity Circus," 9 p.m., NBC. Joey Fatone hosts this new summer reality show, which features B-list stars peforming death-defying circus stunts, or at least defying viewers to vote them out.

"Carrier," 10 p.m., PBS. This interesting episode views the secrets aboard a submarine, including a personal one: Dating is forbidden, but many people follow a "don't ask, don't tell" policy. Usually, it works; near the end of this hour, however, a moment during shore leave has a fierce effect on two lives.