Tuesday's TV Highlights: Shania Twain on 'American Idol'
Shatner's Raw Nerve: Jason Alexander sits down with William Shatner (7 p.m. Biography).
American Idol: Auditions continue in Chicago, with Shania Twain serving as a guest judge (8 p.m. Fox).
Nova: Scientists learn how the Sphinx was carved and reveal details about the people who built it (8 p.m. KCET).
NCIS: Los Angeles: A wealthy bachelor who falls to his death from a rooftop during a party. Callen (Chris O'Donnell, Cool J, Linda Hunt, Peter Cambor and Daniela Ruah also star in this repeat (9 p.m. CBS).
Scrubs: In this new episode, a student cheats on an exam, and Dr. Cox (John C. McGinley) forces the whole class to pay the price in this new episode (9 p.m. ABC).
Frontline: The episode "The Dancing Boys of Afghanistan" tells the story of the "Bacha Bereesh" -- "beardless boys" -- who are trained to sing and dance for men and then are traded for sexual favors (9 p.m. KCET).
How the Earth Was Made: This new episode explores the geological history of Mt. Everest and the Himalayas (9 p.m. History).
Better Off Ted: Ted (Jay Harrington) tries an electronic translators to get closer to a beautiful German who doesn't speak English (9:30 p.m. ABC).
Independent Lens: This new episode explores music sampling and debates about artistic expression, copyright law and money (10 p.m. KCET).
The Millionaire Matchmaker: Patti Stanger returns for a third season (10 p.m. Bravo).
Paranormal Cops: This new series focuses on a group of police officers in the Chicago area who spend their spare time checking out possible paranormal activity (10:30 p.m. A&E).
Inherit the Wind: Arrested for teaching Darwin's theories in the mid-1920s, an educator (Dick York) is defended by a lawyer (Spencer Tracy) and prosecuted by a politician (Fredric March) in this 1960 courtroom drama (5 p.m. TCM).
College basketball: Tennessee at Alabama (4 p.m. ESPN); Clemson at Georgia Tech (4 p.m. ESPN2); Purdue at Illinois (6 p.m. ESPN).
Tennis: Australian Open, second round (6 p.m. and midnight ESPN2).
Hockey: The Buffalo Sabres visit the Ducks (7 p.m. FS Prime); the San Jose Sharks visit the Kings (7:30 p.m. FSN).