“So You Think You Can Dance” (8 p.m., Fox): “So You Think You Can Dance” is

“So You Think You Can Dance” (8 p.m., Fox): “So You Think You Can Dance” is back in step for its fourth season, with the first of several audition shows across the country. The top 20 dancers will be revealed June 5, with the first live results show airing June 12. Nigel Lythgoe and Mary Murphy return as weekly judges, with the third position filled by guest choreographers. Then, once competition is winnowed to the top 10, viewers will have the sole power to decide who stays and who leaves the dance floor.

“Last Comic Standing” (9:30 p.m., NBC): Or maybe you prefer funny business to fancy footwork. NBC’s “Last Comic Standing” returns for a sixth season with host Bill Bellamy (“Def Comedy Jam”) in search of the world’s funniest comedian. Comics from across the U.S. as well as 20 other countries will be trying out. In the premiere, Richard Belzer and Steve Schirripa scout for talent at New York auditions, while Fred Willard and Kathy Najimy check the comedy scene in Tempe, Ariz.