Critic's corner

0 Comments | USA TODAY, July, 2006 | by Bruce Schwartz

*Last year's Rock Star: INXS wasn't exactly No. 1 with a bullet in the ratings. Nonetheless, CBS gives the format a second summer shot with Rock Star: Supernova, premiering tonight (8 ET/PT). This time, instead of competing to front an established band, contestants will vie to become the lead singer of a new "supergroup" formed by Motley Crue drummer Tommy Lee, Metallica bassist Jason Newsted and Guns N' Roses guitarist Gilby Clarke. Once again, Dave Navarro and Brooke Burke return as hosts.

*More than just a jumping-off point for daredevils and lunatics, Niagara Falls (PBS, 8 ET/PT, times may vary) has also been a top draw for lovebirds and tourists for decades. This high-definition special takes viewers to the edge of the waterfall -- without a barrel.

*Even if...